it's a bit unclear why padding is necessary in the first two test cases, where the number of characters (15) is already a multiple of the key size (3 or 5, respectively)
Find the palindrome
Scoring for oriented dominoes
String substitution, sub problem to cryptoMath
Circular Primes (based on Project Euler, problem 35)
Lunar Arithmetic (Multiplication)
Check if the input is a strong prime
Get Next Combination
Repeat string n times
Number of Even Elements in Fibonacci Sequence
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