C11112331312111112111133133313331333132322121111331312113313331333232212321   >>    C1111233131211111211113313331333133313232212111133131211331333133323221232   <<    C11112331312111112111133133313331333132322121111331312113313331333232212323   >>      C11112331312111112111133133313331333132322121111331312113313331333232212322   >>