C11112331312111112111133133313331333132322121111331323231211231   >>    C1111233131211111211113313331333133313232212111133132323121123   <<    C11112331312111112111133133313331333132322121111331323231211233   >>      C11112331312111112111133133313331333132322121111331323231211232   >>