Task: Program Execution
Input (English): 20, 22, ['y', 'R', 'y', 'N', 'n', 'C', 'b', 'l', '7663', '9529', '5449', '4387', '8237', '5913', 'H', 'g', 'H', 'm', 'J', 'P', 'G', 'K']
Output (English): PGK