Task: Program Execution
Input (English): 17, 21, ['7943', '6531', '5821', 'c', '2139', 'X', '4437', 'T', '3639', 'w', 'N', 'u', 'V', 'Y', '7981', '4935', 'b', 'e', 'y', '1357', '5301', '1739', 'J', 'f', 'U', 'U']
Output (English): b, e, y, 1357, 5301