121r
221rr
321rry
421r
521rr
qt2rr
rt2rry
st2r
tt2rr
ut2rry
fk3rry
gk3r
hk3rr
ik3rry
jk3r
4a4r
5a4rr
6a4rry
7a4r
8a4rr
t14rr
u14rry
v14r
w14rr
x14rry