C11111333133313232233133313331333133313231333133311233133313232223221   >>    C1111133313331323223313331333133313331323133313331123313331323222322   <<    C11111333133313232233133313331333133313231333133311233133313232223223   >>      C11111333133313232233133313331333133313231333133311233133313232223222   >>