Task: Program Execution
Input (English): 1, 6, ['6221', 'Z', 'Y', '7403', '2431', 'S', 'Y', '5165', '4551', '8915', 'r', 'Z', '291', '5591', '3605', '9137', '5041', 'b', '7671', 'L', 'O', '9563', 'A', '5971']
Output (English): 6221, Z, Y, 7403, 2431, S