For any sequence s consisting of 1's and 2's, let r(s) denote the length of the nth run of same symbols in s .
There is a unique nontrivial sequence s such that and for all :
Question : Prove or disprove that every segment of r(s) is a segment of s.
For example , the initial segment 1121 of s occurs in r(s) beginning at the 14th term.
I am interested in hints (not full solution)