C111123313331323113313331333133313331323132311233133313232211211111   >>    C11112331333132311331333133313331333132313231123313331323221121111   <<    C111123313331323113313331333133313331323132311233133313232211211113   >>      C111123313331323113313331333133313331323132311233133313232211211112   >>