Task: Program Execution
Input (English): 1, ['8415', 'x', 'l', '3175', 'X', 'x', '2225', '6617', 'a', '2097', '9867', '6181', '727', '9907']
Output (English): x, l, 3175, X, x, 2225, 6617, a, 2097, 9867, 6181, 727, 9907