bibo[8], brio[6], broi[6], robi[6], brwi[6],
bib[7], bob[7], boi[5], obi[5], bor[5], rob[5], roi[3], iwo[3], owi[3], wio[3], wir[3], rwo[3], wow[3],
bi[4], bo[4], or[2], ro[2], iw[2],
