Task: Program Execution
Input (English): 9, 13, ['4389', 'c', 'f', '6871', 'p', '4965', 'w', '6423', 'K', '525', 'x', '5967', '5839', '7393', '9663', 'R', '6361', 'Y', '8229', 'N', '8179', '721']
Output (English): K525x59675839