Task: Program Execution
Input (English): Set1: '{3, 4, 7, 8, 10, 11, 12, 13, 17, 18}', Set2: '{3, 4, 5, 8, 11, 13, 14, 15, 16, 18}'. How many elements are there in the intersection of Set1 and Set2 ?
Output (English): 6