C111123313331323113313331333133313331323323113313331311331311212121   >>    C11112331333132311331333133313331333132332311331333131133131121212   <<    C111123313331323113313331333133313331323323113313331311331311212123   >>      C111123313331323113313331333133313331323323113313331311331311212122   >>