podoi[7],
bido[7], dobo[7], oboi[6], ooid[5],
bid[6], bod[6], boi[5], obi[5], dip[5], pod[5], doi[4], ido[4], odo[4], poi[4],
bi[4], bo[4], id[3], do[3], od[3], pi[3], op[3], po[3],
