C111123313331323113313331333133313331323133113313231333133313121111111   >>    C11112331333132311331333133313331333132313311331323133313331312111111   <<    C111123313331323113313331333133313331323133113313231333133313121111113   >>      C111123313331323113313331333133313331323133113313231333133313121111112   >>