#include <iostream>


using namespace std;

int main(){
	int a;
	int b;
	

	for (int i = 0; i <= 201; i++){
		cin >> a >> b;
		int  c = a + b;
		if (c >= 0 && c < 10){
			cout << "1" << endl;
		}
		else if (c >= 10 && c < 100){
			cout << "2" << endl;
		}
		else if (c >= 100 && c < 1000){
			cout << "3" << endl;
		}
		else if (c >= 1000 && c < 10000){
			cout << "4" << endl;
		}
		else if (c >= 10000 && c < 100000){
			cout << "5" << endl;
		}
		else if (c >= 100000 && c < 1000000){
			cout << "6" << endl;
		}
		else if (c >= 1000000 && c < 10000000){
			cout << "7" << endl;
		}
	}
	
	return 0;
}