chaco[9], coach[9], cocha[9],
bach[9], abba[8], baba[8], abbo[8], babo[8], boba[8], obab[8], baca[7], caba[7], acha[7], baco[7], coba[7], obca[7], caca[6],
bab[7], bob[7], cab[6], ach[6], cha[6], cob[6], hoc[6], och[6], aha[5], abo[5], boa[5], oba[5], hao[5],
ba[4], ha[4], bo[4], ho[4], oh[4], co[3], aa[2],