#include<bits/stdc++.h> using namespace std; int main(){ int a[100000000000000000000000],b[1000000000000000000000000000000],i,n; for(i=0;i<10000000000000000000000000000000;i++){ if(a[i]==0 && b[i]==0){ n=i; break; }else{ cin>>a[i]>>b[i]; } } for(i=0;i<n;i++){ cout<<a[i]+b[i]<<endl; } return 0; }