Task: Program Execution
Input (English): 16, 21, ['u', '1699', '4205', 'g', '9145', 'c', 'X', '9399', 'Y', '7175', 'i', '783', '6749', 'k', 'J', '7297', '8871', 'q', 'o', 'l', 'X', '1255', 'I', '4539', '6929', 'b', 'a', '9521', '5633']
Output (English): 72978871qolX