Task: Program Execution
Input (English): Set1: '{1, 2, 3, 5, 12, 14, 15, 16, 17, 20}', Set2: '{3, 4, 6, 9, 10, 12, 17, 18, 19, 20}'. How many elements are there in the union of Set1 and Set2 ?
Output (English): 16