Task: Program Execution
Input (English): 5, 6, ['R', '3541', 'f', 'o', 'A', '4937', 'M', '3299', 'C', '4523', 'S', 'a', 'T', '5477', '6329', '3901', '3087', '1001', 'r', '1313', 'Q', 'c', '2267']
Output (English): 4937A