watta[7], towot[7], otawa[6], otawo[6],
tata[6], tato[6], toto[6], watt[6], wata[5], otaw[5], wato[5], wota[5],
ata[4], tao[4], oto[4], twa[4], wat[4], owa[3], owo[3],
at[3], ta[3], ot[3], to[3], aa[2],
