c74rc4
d74r
e74rc
f74rc4
g74r
1x5r
2x5rc
3x5rc4
4x5r
5x5rc
qo6rc
ro6rc4
so6r
to6rc
uo6rc4
ff7rc4
gf7r
hf7rc
if7rc4
jf7r
457r
557rc
657rc4
757r
857rc