Task: Program Execution
Input (English): 7, 20, ['1217', '7769', 'Y', '2651', '249', 'L', '3173', 'c', 'W', '2453', 'e', '8209', 'n', '6353', 'U', '6629', 'Q', 'B', 'x', 'T', 'u', '2157', '4017', '8287', 'N', 'W', '5341', '9805', 'x']
Output (English): TxBQ6629U6353n8209e2453Wc3173