C111123313331323113313331333133313231333132311312111133131213111   >>    C11112331333132311331333133313331323133313231131211113313121311   <<    C111123313331323113313331333133313231333132311312111133131213113   >>      C111123313331323113313331333133313231333132311312111133131213112   >>