hub[9], hau[7], uha[7], obu[7], aby[6], boy[6], oby[6], hoy[6], bai[5], hai[5], abo[5], boa[5], oba[5], hao[5], boi[5], obi[5], hoi[5],
bu[6], hu[6], by[5], ba[4], ha[4], bi[4], hi[4], bo[4], ho[4], oh[4], au[4],