C3132121111133313233121111331333133313331333133313331333133313232213221221   >>    C313212111113331323312111133133313331333133313331333133313331323221322122   <<    C3132121111133313233121111331333133313331333133313331333133313232213221223   >>      C3132121111133313233121111331333133313331333133313331333133313232213221222   >>