Task: Program Execution
Input (English): 4, ['M', '8157', '3165', '1051', 'J', 'C', 'j', '4861', 'P', 'x', 'r', '9741', '3413', 'y', '6489', 'o', '7443', 'K', 'F']
Output (English): M, 8157, 3165, 1051