yydr
zydrp
0ydrpv
1ydr
2ydrp
nperp
operpv
pper
qperp
rperpv
cgfrpv
dgfr
egfrp
fgfrpv
ggfr
16fr
26frp
36frpv
46fr
56frp
qxgrp
rxgrpv
sxgr
txgrp
uxgrpv