Task: Program Execution
Input (English): 7, 19, ['t', '6245', 'q', '2135', '7133', '6249', '879', 'B', '3083', '1361', '5073', '8359', '1929', '1769', 'r', '4581', 'M', '7587', '4841', '5287']
Output (English): 879B308313615073835919291769r4581M75874841