dobo[7], boot[7], boso[6], boss[6], toto[6], tost[6], sodo[5], stoo[5], stos[5],
bod[6], bot[6], odo[4], oto[4], sto[4], tss[4], oso[3], sos[3],
bo[4], do[3], od[3], ot[3], to[3], ts[3], os[2],
