#include<iostream>
using namespace std;
int main(){
	int a,b,c1,c2,c3;
	cin>>a>>b;
		c1=b/100;
		if(c1!=a/100 && c1!=a/10%10 && c1!=a%10){
			cout<<"0";
		}
		else if(c1!=a/100 && (c1==a/10%10||c1==a%10)){
			cout<<"1";
		}
		else{
			cout<<"2";
		}
		
		c2=b/10%10;
		if(c2!=a/100 && c2!=a/10%10 && c2!=a%10){
			cout<<"0";
		}
		if(c2!=a/10%10 && (c2==a/100||c2==a%10)){
			cout<<"1";
		}
		if(c2==a/10%10){
			cout<<"2";
		}
		
		c3=b%10;
		if(c3!=a/100 && c3!=a/10%10 && c3!=a%10){
			cout<<"0";
		}
		else if(c3!=a%10 && (c3==a/100||c3==a/10%10)){
			cout<<"1";
		}
		else{
			cout<<"2";
		}
}