biot[7], bito[7], bort[7], torb[7], brio[6], broi[6], robi[6], birr[6], ciot[6], cito[6], tico[6], trio[5], troi[5],
cob[6], bit[6], bot[6], boi[5], obi[5], bor[5], rob[5], brr[5], toi[4], itr[4], tir[4], tri[4], ort[4], rot[4], tor[4], roi[3],
bi[4], bo[4], ci[3], co[3], ot[3], to[3], or[2], ro[2],
