C11112331312111112111133132313331333133313232212111113331323133311212321   >>    C1111233131211111211113313231333133313331323221211111333132313331121232   <<    C11112331312111112111133132313331333133313232212111113331323133311212323   >>      C11112331312111112111133132313331333133313232212111113331323133311212322   >>