#define scanf_s scanf
#include <stdio.h>
#include <iostream>
using namespace std;
#define MAX 200
int main(void)
{
	int a,b,i,sum,cou=0;
	int ans[MAX]={0};
	while (scanf_s("%d %d",&a,&b)!=EOF) {
		sum=a+b;
		++ans[cou];
		if (sum!=0){
			while (1) {
				if (sum<=1) break;
				sum/=10;
				++ans[cou];
			}
		}
		++cou;
	}
	for (i=0;i<cou;++i) {
		if (i!=0) printf("\n");
		printf("%d",ans[i]);
	}
}