0707r0 1707 2707r 3707r0 4707
py17 qy17r ry17r0 sy17 ty17r
ep27r fp27r0 gp27 hp27r ip27r0
3f37r0 4f37 5f37r 6f37r0 7f37
s637 t637r u637r0 v637 w637r