50
.._.|____.|___..|.|._.|..___|...._|...|___..|.._|._.|...__|__..|.__.|__..|_.._|....|_____|_..|._|.____|_.__|___|.___|.|___..|__...|_....|_____|_.._|._..|...|._..|...|__...|.|____.|_|....|...._|._..|.__.|_._.|..._|__...|.._|..._|....|...__|..___|
_.._|_....|_._|__...|..._|....|._..|..._|__..|.__|.|._..|___|__.|._|_._|.|___|.|.|___|.___|___|__...|___..|___|...._|__...|..._|.._|.___|_.._|._|_._|._|_....|___..|_....|____.|..___|_.__|_..|_._.|_|...__|_._|_____|...._|__...|._.|
.___|._..|.....|...._|_.__|...._|.___|_._.|...__|...._|._.|._.|_....|..___|__.|__...|...__|..._|..._|_.__|_._|__.|._.|_.__|____.|____.|_..|.__|____.|..___|_____|___..|..._|__._|___..|_._|_..|_.._|....|__...|_.|._..|__...|.__.|.._.|._.|__..|_._.|...__|__|
___|___..|_._.|___..|__...|..|._|._..|__.|____.|.__|_.._|__|._.|.._|_..|_|.___|_._.|___|.....|.._|___|.|_.__|.___|_.__|.__.|__|.|_...|...|._.|_|...._|_._.|_.__|..|_|____.|.._|__..|_.__|_|_.._|.___|...|...__|__..|_._|
._.|.._|____.|.____|..|...__|.....|.._|_._|.____|_....|..___|__|...__|_.|___|.____|_...|__...|.__.|.....|_..|_._|____.|_....|._|...._|...._|_.__|_....|_._.|._.|.._.|_____|_...|_.|_.__|__.|___..|__._|_____|_.._|_._|...__|_._.|____.|.__.|..___|.|.____|
_._.|__.|..|_..|_.__|_._.|_._|_____|._..|...__|__..|...|__|__|...__|...._|_____|_..|_.|._..|...__|._|..___|._.|____.|.._|..|_____|.__.|_.|.._.|._|.___|__...|.____|....|___..|_...|_____|__..|__._|___..|__...|__...|.|..|...__|...._|._.|._.|
_....|.___|..___|._|.._.|....|___|__..|__..|..|_.|_.__|_._|.___|._..|_..|....|.|_|_...|_.|_.|...._|__..|_.|._..|..._|.|_____|_.|..|_._|____.|...._|__.|_...|_....|....|_____|_.._|...__|_|.___|_...|__|..|_....|...__|...__|._|
__..|_._|...._|_._|_.|.|__|_____|_...|_...|.____|_._.|_.|_____|.._|_.._|__|.__.|.___|..|...|_____|...__|..._|_._|__...|_._|___|..|___|.....|.._.|...._|._..|___|__..|._.|.__|_____|__|...._|_____|._|____.|__..|_____|____.|_...|...._|.._.|
__..|___|____.|.|.._|._.|__.|.._|._.|.....|___|.....|____.|__...|.....|__._|....|.._|...__|__...|....|._|.___|._.|.___|____.|_....|___..|___|_._.|_....|__._|____.|..|..._|___|___|_._|_|._.|_|.._|_....|_.._|_.|.__|_....|___|.....|_.__|
._..|_...|..|.__|___|.__|_|_._.|___..|..._|_|_....|_._|_.__|_.._|.|..___|.__.|..___|...|_._|.._.|.__|._..|._|_.._|_|__.|._|__...|___..|.__|.___|.....|..._|_._.|__...|.....|_.|_....|....|..|_____|.__|.__.|..|...__|_.|....|._.|
.|__._|_._|__._|_____|.__|.....|.____|_..|_.._|..._|..___|...|.._|.._|_|..|....|___|.._.|__|_...|.__|_._|_.|._..|...__|__|...._|.....|____.|__._|__..|.._|__...|_....|._.|_|_...|_____|_.__|._|__...|_.__|_...|_.__|....|__|_|..___|
_.__|_._|.....|_.|._|_....|__.|__...|...._|_...|__...|.__.|_...|..._|..|_____|__..|_....|.___|__|...__|...__|.__.|.___|_...|...__|....|.|__|._..|...__|__.|.._|___..|...._|__._|_...|.._.|_....|._..|.__.|____.|._..|....|_.._|_.__|.....|___|.____|_._.|
...._|.....|__..|.__.|_..|.._.|._.|___|__.|_._.|_.|.....|...|_._|.....|..._|__..|_____|._.|_._.|__|_.|_.__|_...|___|._|.._.|__|_.|.___|_|.__.|_._.|___|____.|__..|__|_____|_.__|._..|._|_...|_....|__..|._..|.._|_._.|___..|.___|..___|
_....|_.._|...__|____.|_.__|..___|...__|_._|..._|__...|___..|__..|..._|...|_..|..___|__|_____|._..|._..|_....|.___|..___|_.|.____|_.|.__.|__._|_.__|..._|._.|._|_...|_|_.._|..._|...__|..___|..._|___|.___|...__|_|....|.._.|__._|__|..._|..___|.____|
__.|.|_|__._|.....|...._|...|.__|_.._|.__.|_.__|____.|._.|_|...|_.._|_._|.....|..._|_.__|_....|...|_.._|__...|.....|..|...._|__._|...._|.._.|....|.____|.__.|_._|_._.|.__.|__|.|_|..|._.|_.._|._.|.._|___|...._|.._.|___..|_.._|._.|
...__|_....|..._|._|__..|.._|.__|__.|__..|.____|._|..___|..|.....|.__|.____|..._|_..|_.._|____.|..|.._.|._..|..._|..___|.__.|_..|._|.____|_...|._.|_..|.___|_...|.|_._.|_....|.._|._.|...._|_._.|..|___..|__.|...__|.____|_._|_.__|..___|.....|
._|._..|____.|__.|...__|...|__..|__...|..___|__._|.__.|._..|_...|___..|__|.__.|_____|_._.|.....|_...|.__.|.._.|_.|..___|..|._..|._|___|._..|..._|___|.._|_.__|__._|___|_____|_...|..._|.|.___|___..|.|....|__...|.._.|__._|__|._.|___..|...|
__|..___|_....|.__|___..|_.._|.____|.__.|___|..._|.___|.....|..._|_._|___..|...._|_._|___..|..._|..._|_....|_.__|.|_____|..._|...|.....|_._.|_.._|._|.|._|.._.|_...|_...|__._|.|.._|__.|_._|_._.|____.|.._.|._|_.._|.|.__.|._.|___..|__...|
_.|._|.__|.___|_._.|_.__|_._.|._..|.__.|_...|_____|.____|._|._..|.....|.__.|..._|__..|..|..|__...|.._.|_._.|.___|___|___..|...__|_._.|__...|__.|__._|__..|____.|_.|_..|__...|__..|__...|.__|__|_..|.._|__...|.__.|_..|_..|__.|.__.|..|.._|
_._.|_._|...__|_._|.|__.|..___|....|.....|__..|....|_.._|_._|___|__...|_....|_...|_.__|.|__...|_.|._|._.|.__|.....|.__.|..___|.._|_._|._|.....|_.|___|.____|...__|....|._.|_..|.._|._.|..___|.._.|...._|__.|__...|_.|__.|.._|._|.___|
.____|__._|_..|__._|.___|._.|__.|__|..___|__.|_._|____.|__...|.._|..|___..|.___|___..|__...|__._|.._.|_..|_._|...__|_.__|_...|..._|_._|_|.____|...|..___|...._|.__|._..|....|.___|.|.|_____|...._|__..|__._|__|___|._.|..|..___|_._|_...|
.._|_....|_..|_....|_|...|_.._|_._.|_____|.|._..|..|__...|.____|.__|____.|...|...._|_|_____|_._|..___|_._|...__|_____|___..|...._|_....|.._.|_...|.____|_._|___|.____|...._|_._.|_.__|.._|__.|.____|..___|._|.__|._|_|_..|___|.____|__._|_...|
_____|__..|__._|.____|_....|_._.|..._|.._.|_._|_.|.|_....|.|.____|___..|____.|._..|._|.._.|_._.|...|___..|_._.|...|.._|..._|___..|.__.|.____|____.|_...|....|.____|..|.__|__.|.._.|_....|.___|...|_.|_....|..._|.___|__.|.____|...|.._.|...__|_._.|
.___|..___|_.|...|.___|.|__.|__|_|.._.|_|..._|._.|_....|...__|.....|..|___..|__|.|..._|...__|..|_.|_....|.__|__|...._|..___|__|..._|_.__|___|.____|....|.....|__...|..._|.....|..._|__..|__..|__._|.__|.....|._.|__|.__|.___|...|
.___|_.__|_..|__...|_...|..._|_....|.|___..|_..|_.__|.__|___..|...|...._|.....|.__|..|__.|._..|.__.|.|_._|_....|___..|.....|_....|__.|_.__|_...|.__|_.._|_.|__...|.___|.____|...|...._|____.|___..|__...|.|..|_..|._|..|__.|.____|._|_.._|
._|.__.|_.._|_._|.._|_._.|____.|.__|.._.|.__|...._|__._|.____|__._|....|.._|..___|___|.____|._.|.....|___|.____|._|____.|.._|.__.|...|.__|__._|.|....|___..|_.__|___|__...|.|__.|..._|..._|.__.|_._|._.|_.__|._|.....|__|....|__._|_.._|
___|.....|.._.|..|_|._..|_....|_...|.|..._|___..|.___|_|_...|_...|...._|._|_.._|___..|__...|_....|___|...__|__...|__...|____.|_...|...__|.__|.._|.._|__.|__..|_._.|...__|._.|...._|...|._|_.|...._|_..|.._.|.....|.....|____.|.___|_.._|...|_____|
...._|__.|__.|_|___|.._|____.|_____|_.|_....|....|_._|__.|__.|..|._|_._.|.___|...|._..|____.|__..|...._|.___|.._.|___..|...._|.__|...|__...|____.|_....|____.|_._|_.|.....|...__|____.|_____|...|..._|..|_._|.._|._|..|_.|..|___..|....|
_._|....|...__|.|___|.._|__|...__|_....|___|.._|._|_|..|.....|..|_.__|.._.|_.._|_...|_|..._|.___|..|__|__|_|.__.|...._|_.|._..|.._|...|...|...__|_.._|_....|__.|....|._|..___|_.._|____.|__..|_.._|...._|.|_...|..___|.____|
__|...._|.|__...|_.|__..|.|_.|.____|._|___..|_.|___|.__.|._..|__..|_...|__...|._|.._.|_._.|..___|_____|...._|__.|____.|__.|...__|.__.|...__|._|._|__|..|.....|.._|__...|____.|___..|.____|__|___|__.|._..|._..|__...|.|_._.|_.._|.__.|
._|_.__|._|.._.|.__|.___|...|..___|__._|_.._|_....|....|__|._|...|_....|_.._|.|.|__..|___|...._|__..|...|_.|.....|__.|.___|...__|.....|_.__|__._|...|_____|....|_._.|_...|__.|_..|.._.|__...|....|___|__._|__...|_|__|_.|__...|._|
__._|._..|_.|_____|__._|.__.|.....|__...|...._|__._|____.|__.|.._|...._|.._.|..._|_.|._|__.|_.._|__..|__._|_._|..._|_|_.._|..._|_...|__|_.__|.._|_|_|___|_._|____.|____.|__.|__|.._.|.._.|...__|...__|.___|___|...|...._|..___|_..|.__.|
__...|_____|_.._|__..|...|...__|..._|.._.|_._.|_._.|....|._|.|_.._|_._|.__|.__|_...|.....|.____|.___|____.|..._|.__|.....|....|__._|___..|..___|_|..._|_._.|...|_____|____.|__|.__|._|..._|.._.|..___|._..|__..|_..|...._|____.|_.|_._.|.|._.|
__._|_...|...__|._..|____.|__._|...._|.____|._|_._|.__.|___|___|_...|_._|.__.|_.._|__._|._.|.._|.....|_.__|...|_._|__.|.._.|_.|.__.|._..|._..|..___|__..|__..|__..|...__|___|_._.|._.|...__|_..|____.|_._.|.....|.._.|..|.___|.___|_.__|__|__..|
_..|___..|_..|..._|..|..|...__|_....|._.|_.._|_._|__..|___..|_._|..___|_._|.____|.__|__|...__|_.__|__.|_.|..___|_.|.._|._.|___..|._.|_|...._|__|_.__|___|..|_...|_._.|...|....|_.|___|._..|._|_._|_|.___|_|_...|...._|__._|
____.|.....|____.|__._|_._.|____.|.|....|...._|....|_.__|.....|..|_.|_.|_.|.____|._|.._.|_._|..___|__.|.___|_....|_._.|.._.|___|.|._..|.._.|_..|_.|__..|_.__|....|__...|.___|.___|__...|.__|____.|.._.|__..|._|._|.__.|__..|._.|.|_...|
__|__.|.._|.....|..._|..|_.__|._|.____|__...|__._|._..|._|_|.|__|.....|.___|_|____.|_|_.|._|....|...__|...._|__._|.__.|__|__|_.._|_...|_..|.|_.._|__|.__|__|..._|._|.....|___..|__..|_._.|.._|._|__...|_____|_....|._|
__|__._|.__|...__|._|___|_____|.._.|._.|_.__|....|.._|._|_.._|_.._|_._.|_...|..|__..|_....|_|..___|__..|_...|__._|..___|....|__.|_.._|.__|..._|...._|_....|_....|_____|..|...__|...._|_._|__.|_.._|.__.|_...|....|._..|_....|_|....|._.|_.._|
_.|.._.|__._|.._.|..._|__..|_..|.__|.___|.....|..|_._|...._|.|.....|...__|_.__|._|._.|___|...__|_.._|_._|.....|_____|._|._..|_.__|._..|___|..|___|_..|._.|__..|...._|_.._|.___|.__.|_._|._..|_._.|___|._..|.__.|__._|._.|._|._..|.__.|
.___|...._|___|...__|..._|__..|____.|.__.|.._.|_._.|_|._.|_._.|._.|__..|___..|...|__|..___|.....|.|_....|_...|____.|_____|..|...__|____.|_...|.|....|_.._|__...|....|._.|_...|__...|.___|___..|.____|_...|_._|_.__|.____|._..|.____|.___|_____|.__.|_._|
_.__|...|__.|_|._.|__.|._|__.|_|__.|__._|.__.|_.|_____|__._|_.|_____|__...|____.|_._.|__.|...|_|__...|_.|__|_____|.._.|___|_..|_|.___|__..|...._|.|._|__..|...._|_.__|__|__...|_..|_._.|..._|_.__|...._|__|_|___|....|
.___|__|_.__|____.|_..|.....|_..|.._|.._.|___..|...__|..___|....|..._|.___|.__.|._|....|.|_.|.___|__|__|..|....|_..|__._|...._|....|__.|..___|._.|_..|_.|...|__.|_....|.____|..._|_|_____|____.|__..|...__|____.|__..|_|.._.|.._|._..|
_..|_|_....|...._|_.._|_.._|.....|.___|.._.|.__|_____|__.|_.__|._.|.____|___|._..|.__.|.__.|...._|_.._|.._.|_._.|.....|...|_.|.....|...._|.__.|_.|._.|_.__|..___|_._|.__|....|_._.|__.|.._.|__.|__._|.___|...__|___|____.|.__|._..|...._|__._|_____|
__|____.|..._|____.|__..|._..|_.|...._|.....|_|_._|__..|.____|_..|...|.____|_.__|.____|.__|_....|_____|._..|_....|.___|._..|_._|____.|_|..|....|.....|__._|.____|_|.|.__.|___..|....|..|.__.|....|._.|._..|...|__..|__|_____|...|..._|__..|
__..|...__|___|_.._|___..|__..|...._|....|.____|...|_____|.._.|_._.|_..|__|_._|._..|...._|.....|...|...._|__._|...._|._..|.__.|..|_.|_._.|...|._..|.|...|_._|_...|_...|._..|._.|_...|_.__|._.|_.__|__.|.___|.._.|..._|._|...._|.__.|.__|._.|
__.|_...|__._|___..|__...|.__|__|..|._.|__.|._.|._..|.|.___|_._.|.....|.__.|_.._|_...|___..|.__|._..|..___|._..|.___|._..|___|.._|.__.|.__|.__|...._|.|_.._|_.__|____.|_....|__...|.|_....|_____|._|____.|..___|___|.....|.____|.___|_..|__.|
_._.|_._.|__._|__.|___|..._|...__|___|__._|...__|_...|.._|...|____.|_.|...__|..._|.._|_.._|__..|_.._|__.|_....|_|.___|.|...|.._|..___|____.|_|__|._.|.__|__.|.._.|_..|._|.__.|.__.|..___|..._|_...|__..|.__|__.|__...|...|_|_...|
_._|__.|_.._|.___|._..|.____|___..|_.|__._|._..|.__|_.._|.___|.__.|...__|_._|____.|.._.|._.|..___|_...|..._|.....|...|.__|__...|.....|._.|_..|.....|_..|.____|__|.....|___|..|_____|_.|.__|__..|__._|._|.__.|...._|___..|__._|_____|._..|.._.|___|
_|__..|__|.___|__.|_____|_._.|...|.._|.____|.._.|.____|.._|..___|__.|__..|____.|_.|__.|__..|_._|.__.|__..|.._|..._|._|...__|.___|.._.|_..|...|_.._|___|..|._..|_._|._.|.._|.____|_|__..|....|..._|_.._|_._.|__...|.._|._..|____.|_..|
_..|_._|_...|__.|__..|.____|__._|._.|._|.__|...__|_....|____.|._|__|_.._|.|__...|___..|.....|___|___..|.____|_|.._|.__.|.__|.....|_._.|_._|..._|...._|._.|__...|____.|.|_._.|.|._..|_____|__...|_|__.|_.__|._|__.|_.__|.__.|..._|___..|