amba[7], ameb[7], ambo[7],
amb[6], bam[6], bom[6], mob[6], abo[5], boa[5], oba[5], maa[4], moa[4], oma[4], aaa[3],
ba[4], be[4], bo[4], ma[3], em[3], me[3], om[3], aa[2], eo[2],
