Task: Program Execution
Input (English): 1, 15, ['M', 'E', '1821', '1085', 'c', '4691', '3727', '6197', 'L', 'k', 'z', '6973', '4967', 'k', '6867']
Output (English): ME18211085c469137276197Lkz69734967k6867