20
15
111111111111111
111111111111111
110000000000000
110000000000000
110000000000000
110000000000000
110000000000000
110000000000000
110000000000000
111111111111110
111111111111110
110000000000000
110000000000000
110000000000000
110000000000000
110000000000000
110000000000000
110000000000000
111111111111111
111111111111111
