abbo[8], babo[8], boba[8], obab[8], baco[7], coba[7], obca[7], bako[7], coka[6], koca[6],
bab[7], bob[7], cab[6], bak[6], cob[6], bok[6], kac[5], abo[5], boa[5], oba[5], koc[5], oka[4],
ba[4], bo[4], ka[3], co[3], ko[3], ok[3],
