71ly 81lyb 91lyb2 a2ly b2lyb
wsmyb xsmyb2 ysmy zsmyb 0smyb2
ljnyb2 mjny njnyb ojnyb2 pjny
aaoy baoyb caoyb2 daoy eaoyb
z0oyb 00oyb2 10oy 20oyb 30oyb2