x21nby
y21n
z21nb
021nby
121n
mt2n
nt2nb
ot2nby
pt2n
qt2nb
bk3nb
ck3nby
dk3n
ek3nb
fk3nby
0a4nby
1a4n
2a4nb
3a4nby
4a4n
p14n
q14nb
r14nby
s14n
t14nb