C1111121111331311211331333133313331333133313231333133313331333131333121123311   >>    C111112111133131121133133313331333133313331323133313331333133313133312112331   <<    C1111121111331311211331333133313331333133313231333133313331333131333121123313   >>      C1111121111331311211331333133313331333133313231333133313331333131333121123312   >>