C11112331312111112111133132313331333133313232213331323133313112331312323231   >>    C1111233131211111211113313231333133313331323221333132313331311233131232323   <<    C11112331312111112111133132313331333133313232213331323133313112331312323233   >>      C11112331312111112111133132313331333133313232213331323133313112331312323232   >>