Task: Program Execution
Input (English): 12, 21, ['a', '2479', 'p', '3835', '6431', '1407', '7831', 'E', 'l', 'w', '2121', 't', '3221', '7653', 'U', '8029', 'Z', 'Z', 'H', '2647', '2667']
Output (English): 26672647HZZ8029U76533221t