koso[5], osok[5], woko[5], wosk[5], kozo[5], kosz[5], oksz[5], szok[5], sowo[4], wszo[4],
oko[4], kos[4], sok[4], kwo[4], wok[4], oso[3], owo[3], zoo[3],
ko[3], ok[3], os[2], oz[2],
