Task: Program Execution
Input (English): 8, ['d', '1851', 'G', 'A', '8437', '5003', '3747', 'D', 'E', 'K', '9273', '5855', '7683', 'b', '1925', 'L', 'R', 'v', 'R', 'a']
Output (English): d, E, R