#include<iostream>
#include<string>
 
using namespace std;
int main()
{	
	int l1,k=0, i, l2,j,p; 
	char s_num1[110], s_num2[110], s_ans[111]; 
	int tens=0, ones, ans;
	cin>>s_num1;
	cin>>s_num2;
	//cout<<(int) s_num1[0];
	for(l1=0;s_num1[l1]!='\0';l1++);
	for(l2=0;s_num2[l2]!='\0';l2++);
	l1--;
	l2--;
	for(i=l1, j = l2;(i>=0)&&(j>=0);i--,j--){
		ans = (int) s_num1[i] + (int) s_num2[j] + tens - 2*48;
		ones=ans%10;
		tens=ans/10;
		s_ans[k] = ones + 48;
		k++;
	}
 
	while(i>=0){
		cout<<"str 1 bigger\n";
		ans = tens + (int) s_num1[i] -48;
		ones=ans%10;
		tens=ans/10;
		s_ans[k] = ones + 48;
		k++;
		i--;
	}
 
	while(j>=0){
		cout<<"str2 biigger\n";
		ans = tens + (int) s_num2[j] -48;
		ones=ans%10;
		tens=ans/10;
		s_ans[k] = ones + 48;
		k++;
		j--;
	}
 
	if(tens!=0)
		s_ans[k++] = tens+48;	
 
 
	cout<<k<<endl;
	for(p=k-1;p>=0;p--)
		cout<<s_ans[p];
 
	return 0;
}