ykzr
zkzrb
0kzrbi
1kzr
2kzrb
nb0rb
ob0rbi
pb0r
qb0rb
rb0rbi
c20rbi
d20r
e20rb
f20rbi
g20r
1s1r
2s1rb
3s1rbi
4s1r
5s1rb
qj2rb
rj2rbi
sj2r
tj2rb
uj2rbi