C3132121111133313233121111331333133313331333133313133313231322131   >>    C313212111113331323312111133133313331333133313331313331323132213   <<    C3132121111133313233121111331333133313331333133313133313231322133   >>      C3132121111133313233121111331333133313331333133313133313231322132   >>