#include<iostream>
using namespace std;
int main()
{
	int a, b, sum;
	for (int i = 0; i < 200; i++)
	{
		cin >> a >> b;
		sum = a + b;
		if (sum < 10)cout << "1" << endl;
		if (sum < 100 && sum >= 10)cout << "2" << endl;
		if (sum < 1000 && sum >= 100)cout << "3" << endl;
		if (sum < 10000 && sum >= 1000)cout << "4" << endl;
		if (sum < 100000 && sum >= 10000)cout << "5" << endl;
		if (sum < 1000000 && sum >= 100000)cout << "6" << endl;
		if (sum < 10000000 && sum >= 1000000)cout << "7" << endl;

	}
}