biby[9], bije[8], byki[8], beki[7], kije[7],
bib[7], bej[7], jeb[7], bij[7], byk[7], bek[6], kej[6], kij[6], kei[4], kie[4],
by[5], be[4], bi[4], ej[4], je[4], ki[3],
