C111123313331323113313331333133313231323133312111112111113331311331333111   >>    C11112331333132311331333133313331323132313331211111211111333131133133311   <<    C111123313331323113313331333133313231323133312111112111113331311331333113   >>      C111123313331323113313331333133313231323133312111112111113331311331333112   >>