rock[6], cors[5], kors[5], kros[5], skro[5], srok[5], skos[5],
koc[5], kor[4], kro[4], okr[4], ork[4], rok[4], soc[4], kos[4], sok[4], ros[3], sos[3],
co[3], ko[3], ok[3], or[2], ro[2], os[2],
