10 3
r
.aaaaaaaaa
b.bbbbbbbb
cc.ccccccc
ddd.dddddd
eeee.eeeee
fffff.ffff
gggggg.ggg
hhhhhhh.hh
iiiiiiii.i
jjjjjjjjj.
c
.bcdefghij
a.cdefghij
ab.defghij
abc.efghij
abcd.fghij
abcde.ghij
abcdef.hij
abcdefg.ij
abcdefgh.j
abcdefghi.
a
.abbcccddd
e.abcccddd
fe.acccddd
ffe.abbggg
hhhe.abggg
hhhfe.aggg
hhhffe.abb
iiijjje.ab
iiijjjfe.a
iiijjjffe.