Task: Program Execution
Input (English): 11, 23, ['F', 'F', 'D', 'R', 'L', 'Z', 'D', 'B', 'I', 'J', 'U', 'L', '2811', '7157', 'j', 'o', '5377', '207', '6579', 'U', '2909', '7277', '9513']
Output (English): UL28117157jo53772076579U290972779513