C11111333133313232233133313331333133313231312111133131123313333121122112311321   >>    C1111133313331323223313331333133313331323131211113313112331333312112211231132   <<    C11111333133313232233133313331333133313231312111133131123313333121122112311323   >>      C11111333133313232233133313331333133313231312111133131123313333121122112311322   >>