Task: Program Execution
Input (English): 1, 11, ['1271', 'i', 'u', 'Z', '481', '7791', '5069', '405', '7555', 'b', '5845', 'd', 'l', '4575', '253', '8449', '7207', 't', 'M', '3493', '4267', '4899']
Output (English): 5485b555750496051977184Zui1721