C111123313331323113313331333133313331323112133313331333121111133313311232111   >>    C11112331333132311331333133313331333132311213331333133312111113331331123211   <<    C111123313331323113313331333133313331323112133313331333121111133313311232113   >>      C111123313331323113313331333133313331323112133313331333121111133313311232112   >>