bomb[9], bibo[8], pomb[8], bimo[7], biom[7],
bib[7], bob[7], bim[6], bom[6], mob[6], boi[5], obi[5], mop[5], moi[4], poi[4],
bi[4], bo[4], im[3], mi[3], om[3], pi[3], op[3], po[3],
