bake[9], bike[9], keib[9], abba[8], baba[8], abbe[8],
bak[8], beb[7], ebb[7], kea[6], aki[6], kai[6], aba[5], abi[5], bai[5], bei[5], eia[3],
ab[4], bi[4], aa[2], ai[2], ei[2],
