Task: Program Execution
Input (English): 1, 15, ['l', 'A', 'U', 'A', '9881', 's', 'p', '8471', '3455', 'z', 'x', 'c', 'f', 'a', 'l', 'b', '6955', '887', 'Z', '1767']
Output (English): lafcxz34558471ps9881AUAl