C111123313331323113313331333133313331323323113313331333131322331323132313121   >>    C11112331333132311331333133313331333132332311331333133313132233132313231312   <<    C111123313331323113313331333133313331323323113313331333131322331323132313123   >>      C111123313331323113313331333133313331323323113313331333131322331323132313122   >>