C111123313331323113313331333133313331122112312111133133313331333131133311213111   >>    C11112331333132311331333133313331333112211231211113313331333133313113331121311   <<    C111123313331323113313331333133313331122112312111133133313331333131133311213113   >>      C111123313331323113313331333133313331122112312111133133313331333131133311213112   >>