// editor3
#include<iostream>
#include<string>
using namespace std;
int main(){
    string a,b;
    cin>>a>>b;
    int i=a.length()-1;
    int j=b.length()-1;
    int carry=0;
    string result ="";
    while(i>=0||j>=0||carry){
        int sum =carry;
        if(i>=0)
        sum+=a[i--]-'0';
        if(j>=0)
        sum+=b[j--]-'0';
        result=char(sum((sum%2)+'0')+result;
        carry=sum/2;
    }
    cout<<result;
    return 0;
}