1ocn 2ocn2 3ocn21 4ocn 5ocn2

qfdn2 rfdn21 sfdn tfdn2 ufdn21

f6dn21 g6dn h6dn2 i6dn21 j6dn

4wen 5wen2 6wen21 7wen 8wen2

tnfn2 unfn21 vnfn wnfn2 xnfn21