Task: Program Execution
Input (English): 1, 20, ['v', '9281', '6167', '8669', 'B', '6513', 'X', 'z', '3691', 'r', '2171', '3441', 'n', 'X', 'B', '1801', 'r', '5823', '2787', '3471', '8039']
Output (English): 347127875823r1801BXn34412171r3691zX6513B866961679281v