This problem requires more test cases. My solution as many others would fail for a case in which the searched substring is not ordered.
First N Perfect Squares
Stuff the Board
Eliminate Polysyllabics: Long live short words!
sum of non-primes
Min of a Matrix
possible ways through matrix
Generate this matrix
Tribute to Ramanujan
Fermat's last theorem - again
Integer sequence - 2 : Kolakoski sequence
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