Task: Program Execution
Input (English): 1, 9, ['u', 'R', '8929', '9853', 'W', 'p', 'P', '2809', '229', 'z', '4401', 'r', 'I', '5627', 'g', 'X', '499', 'S', 'z', '5783', '9421', '9311']
Output (English): u, z, z