#include<bits/stdc++.h>
using namespace std;

int main(){
  int a,b;
  while(cin >> a >> b){
    int ans=a+b;
    if(ans>=1000000){
      cout << 7 << endl;
    }else if(ans>=100000){
      cout << 6 << endl;
    }else if(ans>=10000){
      cout << 5 << endl;
    }else if(ans>=1000){
      cout << 4 << endl;
    }else if(ans>=100){
      cout << 3 << endl;
    }else if(ans>=10){
      cout << 2 << endl;
    }else if(ans >=0){
      cout << 1 << endl;
    }
  }
  return 0;
}