C11112331312111112111133133313331333132322121111331323331123223323133323231   >>    C1111233131211111211113313331333133313232212111133132333112322332313332323   <<    C11112331312111112111133133313331333132322121111331323331123223323133323233   >>      C11112331312111112111133133313331333132322121111331323331123223323133323232   >>