cob[6], bod[6], bok[6], bot[6], cod[5], doc[5], koc[5], dok[5], kod[5], kot[5], kto[5], tok[5], kwo[4], wok[4], wow[3],
bo[4], co[3], do[3], od[3], ko[3], ok[3], ot[3], to[3],
