krę[8], erę[7], kry[5], ryk[5], eko[4], oko[4], ker[4], rek[4], kor[4], kro[4], okr[4], ork[4], rok[4], ery[4], ero[3], oro[3],
ko[3], ok[3], eo[2], er[2], re[2], or[2], ro[2],