C3132121111133313233121111331333133313331312121111132213232212121   >>    C313212111113331323312111133133313331333131212111113221323221212   <<    C3132121111133313233121111331333133313331312121111132213232212123   >>      C3132121111133313233121111331333133313331312121111132213232212122   >>