obco[7], kobo[7], obok[7], bono[6], obon[6], okno[5], nono[4],
cob[6], bok[6], koc[5], bon[5], noc[4], nok[4], oko[4], non[3], ono[3],
bo[4], co[3], ko[3], ok[3], no[2], on[2],
