import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String[] N1 = new String[3];
      	int ans = 0;
      	sc.useDelimiter("");
      	N1[0] = sc.next();
      	N1[1] = sc.next();
      	N1[2] = sc.next();
	    sc.next();
		for (int i = 0; i < 3; i++) {
			if (N1[i].equals(sc.next())) {
				ans++;
			}
		}
		System.out.println(ans);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz