20 20
AAAAAAAAABBBBBBCCCCC
DDDDEEEEEEEEEEEFFGHH
IIIIJJJJJJKKKKKKKKKK
LLMMMMMMMMMMMMMNNNNN
OOOOOOOOPPPPPPPPPPPQ
RRRRRRRRRRRRRRRRRSSS
TTTTTTTTUUUUVVVVVVVV
WWWXXYZZZZZZZZZZZZZZ
aaaaaaabbbbbbccccddd
eeeeefffgghhhijjjjjj
klmmmmmmmmmnnnnnnnnn
ooppppppqqqqqqqrrsss
ttttuuuvvvvwwwxxxxxx
yyzzzz00000000000000
11111123333345677778
99999999999999999999
99999999999999999999
99999999999999999999
99999999999999999999
99999999999999999999
