Task: Program Execution
Input (English): 21, 23, ['b', '3061', '8041', 'U', '7087', 'D', '615', 'p', '7403', '9519', '8179', '4721', '4855', '6689', '7179', '4783', 'p', '2693', '8217', '3535', '4863', '7833', 'i', '4397', 'l']
Output (English): i78334863