koto[6], otok[6], skot[6], stok[6], koso[5], osok[5], stoo[5],
kot[5], kto[5], tok[5], oko[4], kos[4], sok[4], oto[4], sto[4], oso[3],
ko[3], ok[3], ot[3], to[3], ts[3], os[2],
