test for future ASCII art 31x31

0123456789abcdefghijklmnopqrstu
123456789abcdefghijklmnopqrstu0
23456789abcdefghijklmnopqrstu01
3456789abcdefghijklmnopqrstu012
456789abcdefghijklmnopqrstu0123
56789abcdefghijklmnopqrstu01234
6789abcdefghijklmnopqrstu012345
789abcdefghijklmnopqrstu0123456
89abcdefghijklmnopqrstu01234567
9abcdefghijklmnopqrstu012345678
abcdefghijklmnopqrstu0123456789
bcdefghijklmnopqrstu0123456789a
cdefghijklmnopqrstu0123456789ab
defghijklmnopqrstu0123456789abc
efghijklmnopqrstu0123456789abcd
fghijklmnopqrstu0123456789abcde
ghijklmnopqrstu0123456789abcdef
hijklmnopqrstu0123456789abcdefg
ijklmnopqrstu0123456789abcdefgh
jklmnopqrstu0123456789abcdefghi
klmnopqrstu0123456789abcdefghij
lmnopqrstu0123456789abcdefghijk
mnopqrstu0123456789abcdefghijkl
nopqrstu0123456789abcdefghijklm
opqrstu0123456789abcdefghijklmn
pqrstu0123456789abcdefghijklmno
qrstu0123456789abcdefghijklmnop
rstu0123456789abcdefghijklmnopq
stu0123456789abcdefghijklmnopqr
tu0123456789abcdefghijklmnopqrs
u0123456789abcdefghijklmnopqrst