C11112331312111112111133133313331333132322121111331312113213321   >>    C1111233131211111211113313331333133313232212111133131211321332   <<    C11112331312111112111133133313331333132322121111331312113213323   >>      C11112331312111112111133133313331333132322121111331312113213322   >>