Task: Program Execution
Input (English): 1, 19, ['9529', 'D', 'y', 'b', 'U', 'l', 'x', '6843', 'L', '7153', 'C', '6875', 'Y', '4647', 'm', '3831', '7305', 'q', 'f', '9249', 'z', '5991', '4575']
Output (English): fq50371383m7464Y5786C3517L3486xlUbyD9259