Task: Program Execution
Input (English): 20, 21, ['3335', '9721', '8247', 'X', 'A', '1593', '8051', 'x', 'M', 'n', '8817', 'I', 'j', '9787', 'V', 'L', '7075', '9883', '7383', '4943', 'o', '7507', '3307', 'R']
Output (English): o3494