C11112331312111112111133133313331333132322121111331322231123231   >>    C1111233131211111211113313331333133313232212111133132223112323   <<    C11112331312111112111133133313331333132322121111331322231123233   >>      C11112331312111112111133133313331333132322121111331322231123232   >>