C1231321123223331211111131211113313331333133311233131131121331131322311   >>    C123132112322333121111113121111331333133313331123313113112133113132231   <<    C1231321123223331211111131211113313331333133311233131131121331131322313   >>      C1231321123223331211111131211113313331333133311233131131121331131322312   >>