Task: Program Execution
Input (English): 5, 8, ['6865', '2749', '2621', '1537', 'r', '7383', 'L', 'm', '6837', '5399', 'U', 'f', 'Z', '4435', 'f', 'd', '1873', 'W']
Output (English): r, 7383, L, m