Task: Program Execution
Input (English): 6, ['X', '7733', '9621', 'o', '5813', '8347', 'v', 'r', '9577', '5621', 'U', '6089', '8941', '3809', '7871']
Output (English): v, r, 9577, 5621, U, 6089, 8941, 3809, 7871