brio[6], broi[6], robi[6], birr[6], brwi[6],
boi[5], obi[5], bor[5], rob[5], brr[5], roi[3], iwo[3], owi[3], wio[3], wir[3], rwo[3], wrr[3],
bi[4], bo[4], or[2], ro[2], iw[2],
