Task: Program Execution
Input (English): 21, 24, ['O', '6081', 'T', '5983', '749', '5403', 'j', 'a', 't', '7113', 'G', 'b', '7399', 'J', 'b', '4441', '1111', 'G', 'D', '6621', '7615', 'Z', 'f', 'a']
Output (English): 7615Zfa