C111123313331323113313331333133313331323132311233133313232112111   >>    C11112331333132311331333133313331333132313231123313331323211211   <<    C111123313331323113313331333133313331323132311233133313232112113   >>      C111123313331323113313331333133313331323132311233133313232112112   >>