8a4on
7a4o
6a4onr
5a4on
4a4o
jk3o
ik3onr
hk3on
gk3o
fk3onr
ut2onr
tt2on
st2o
rt2onr
qt2on
521on
421o
321onr
221on
121o
gc1o
fc1onr
ec1on
dc1o
cc1onr