C3132121111133313233121111331333133313331333133313331333133313232212121211   >>    C313212111113331323312111133133313331333133313331333133313331323221212121   <<    C3132121111133313233121111331333133313331333133313331333133313232212121213   >>      C3132121111133313233121111331333133313331333133313331333133313232212121212   >>