Task: Program Execution
Input (English): 3, 19, ['4985', '7681', 'm', 'W', 'd', 'T', 'r', '4267', '8779', '7709', 'c', '3963', 'X', 'y', '9587', '9435', '6101', '4999', 'b']
Output (English): b4999610194359587yX3963c770987794267rTdWm