Task: Program Execution
Input (English): 4, 24, ['N', '2081', 'C', '7687', 's', '8047', '1755', 'u', 'Y', '4779', 'i', '869', 'l', 'Y', '6117', 'n', '1987', '9555', 'm', 't', '1701', 'U', '7973', 'U', '7059', 'S', '6553', '8873']
Output (English): U7973U1701tm95551987n6117Yl869i4779Yu17558047s7687