codo[6], pond[6], poco[6], donn[5], opon[5], pono[5], nono[4],
cod[5], doc[5], pod[5], pop[5], noc[4], dno[4], don[4], odo[4], non[3], ono[3],
co[3], do[3], od[3], op[3], po[3], no[2], on[2],
