Does the array contain this string?

Question

I can't get the numbers to all be unique because they are repeating.
Can someone show me what I did wrong?
https://code.sololearn.com/c9Ju5NyFz578/?ref=app

Answer 1

By encrypt 1234567890 text, at the end it print 2x mum codes. mixed in one line
See next discussion, same problem I answered there.

https://www.sololearn.com/Discuss/2928697/?ref=app