C123132112322333121111113121111331333133313231333133323223211212223221   >>    C12313211232233312111111312111133133313331323133313332322321121222322   <<    C123132112322333121111113121111331333133313231333133323223211212223223   >>      C123132112322333121111113121111331333133313231333133323223211212223222   >>