y2uu
x2uugp
w2uug
v2uu
u2uugp
9buugp
8buug
7buu
6buugp
5buug
kltug
jltu
iltugp
hltug
gltu
vusu
uusugp
tusug
susu
rusugp
63rugp
53rug
43ru
33rugp
23rug