#include<iostream>
using namespace std;
int a,b;
int main(){
	while(cin>>a>>b){
		int c=a+b;
		if(c/1000000>=1){
			cout<<7<<endl;
		}
		else if(c/100000>=1){
			cout<<6<<endl;
		}
		else if(c/10000>=1){
			cout<<5<<endl;
		}
		else if(c/1000>=1){
			cout<<4<<endl;
		}
		else if(c/100>=1){
			cout<<3<<endl;
		}
		else if(c/10>=1){
			cout<<2<<endl;
		}
		else{
			cout<<1<<endl;
		}
	}
	return 0;
}			
