Task: Program Execution
Input (English): 13, 15, ['p', '6451', 'n', 'n', '2997', '9333', 'g', 't', '7219', 'g', '7853', 'q', 'U', 'U', '789', 'A', 'U', '159', '845', 'c', 'f', '8531', 'p', 'd', 'e']
Output (English): 789UU