Task: Program Execution
Input (English): Set1: '{1, 2, 4, 7, 8, 14, 15, 16, 19}', Set2: '{1, 3, 5, 6, 7, 8, 10, 11, 15, 19}'. How many elements are there in the intersection of Set1 and Set2 ?
Output (English): 5