
import java.util.ArrayList;
import java.util.Scanner;


public class Main {
public static void main (String[] args){


	Scanner sc =new Scanner(System.in);
	ArrayList<String> list=new ArrayList<String>();


	while(sc.hasNext()) {
		list.add(sc.nextLine());
	}
	
	


	int i=0;
	
	if(list.get(0).charAt(0)==list.get(1).charAt(0))i++;
	if(list.get(0).charAt(1)==list.get(1).charAt(1))i++;
	if(list.get(0).charAt(2)==list.get(1).charAt(2))i++;

	

	System.out.print(i);

}
}


/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