#include<iostream>
#include <stdio.h>
using namespace std;
int main(){
	int a,b;
	while(cin>>a>>b){
	int c=a+b;
	if(c>=1000000){
		cout<<7<<endl;}else
	if(c>=100000){
		cout<<6<<endl;}else
	if(c>=10000){
		cout<<5<<endl;}else
	if(c>=1000){
		cout<<4<<endl;}else
	if(c>=100){
		cout<<3<<endl;}else
	if(c>=10){
		cout<<2<<endl;}else{
		cout<<1<<endl;}
	}
	return 0;}
