#include <iostream>
#include<cmath>
using namespace std;

int main()
{
	int a, b, c, su = 1000000;
	for (int i = 1; i <= 200; i++) {
		cin >> a >> b;
		c = a + b;
		if (c == 0) {
			cout << "0" << endl;
		}
		else {
			for (int j = 7; j >= 1; j--) {
				if (c >= su) {
					cout << j << endl;
					su = 1000000;
					break;
				}
				else {
					su /= 10;
				}
			}
		}
	}

	return 0;
}