1x11x1x1x1x11x1x11111x1
x1x11x1x11x11x1x111x11x
11x11x1x11x1x11x1x1x11x
11x1x111x111277x1x277x
277x1x277x2777x277=1
1x11x1x1x1x11x1x11111x1
x1x11x1x11x11x1x111x11x
11x11x1x11x1x11x1x1x11x
11x1x111x111277x1x277x
277x1x277x2777x277=1
1x11x1x1x1x11x1x11111x1
x1x11x1x11x11x1x111x11x
11x11x1x11x1x11x1x1x11x
11x1x111x111277x1x277x
277x1x277x2777x277=1
1x11x1x1x1x11x1x11111x1
x1x11x1x11x11x1x111x11x
11x11x1x11x1x11x1x1x11x
11x1x111x111277x1x277x
277x1x277x2777x277=1
1x11x1x1x1x11x1x11111x1
x1x11x1x11x11x1x111x11x
11x11x1x11x1x11x1x1x11x
11x1x111x111277x1x277x
277x1x277x2777x277=11x11x1x1x1x11x1x11111x1
x1x11x1x11x11x1x111x11x
11x11x1x11x1x11x1x1x11x
11x1x111x111277x1x277x
277x1x277x2777x277=11x11x1...