biby[9], boby[9], bibo[8], bisy[7], bosy[7], bios[6], bosi[6],
bib[7], bob[7], boy[6], oby[6], boi[5], obi[5], bis[5], osy[4], osi[3], sio[3], soi[3],
by[5], bi[4], bo[4], si[2], os[2],
