yto1
zto1o
0to1op
1to1
2to1o
nkp1o
okp1op
pkp1
qkp1o
rkp1op
cbq1op
dbq1
ebq1o
fbq1op
gbq1
11q1
21q1o
31q1op
41q1
51q1o
qsr1o
rsr1op
ssr1
tsr1o
usr1op