oswoi[5],
ossi[4], siwo[4], sowi[4], swoi[4], wsio[4], sowo[4],
osi[3], sio[3], soi[3], oso[3], sos[3], iwo[3], owi[3], wio[3], owo[3], siw[3], wis[3], wsi[3],
si[2], os[2], iw[2],
