# Question is about a paper “A Block-sorting Lossless Data Compression Algorithm” by M. Burrows and D.J. Wheeler

In the paper A Block-sorting Lossless Data Compression Algorithm by M. Burrows and D.J. Wheeler Link. On page number 5. please describe this line

If the original string $$S$$ is of the form $$Z^p$$ for some substring $$Z$$ and some $$p > 1$$, then the sequence $$T^i[I]$$ for $$i = 0,...., N - 1$$ will also be of the form $$Z'^p$$ for some subsequence $$Z'$$.

• What do you want to know about it? What do you already understand, and what are you confused about? Do you want to know what it means? Why it's true? Please edit your question to clarify. This will help us get you better answers. – D.W. Apr 19 '19 at 23:03
• Am sorry if my question is not clear to you but Answer given by "Bulat" is what am confused about. – yuvraj97 Apr 20 '19 at 21:24