aotn 9ntn21 8ntn2 7ntn 6ntn21

lxsn21 kxsn2 jxsn ixsn21 hxsn2

w6rn2 v6rn u6rn21 t6rn2 s6rn

7frn 6frn21 5frn2 4frn 3frn21

ipqn21 hpqn2 gpqn fpqn21 epqn2