Task: Program Execution
Input (English): 2, 20, ['O', '6321', '6123', '4459', 'Q', 'K', 'Q', 'r', '3107', '6057', '181', 'i', 'a', '3187', '5439', 'U', 'Y', '749', 'o', '7979']
Output (English): 632161234459QKQr31076057181ia31875439UY749o7979