#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b;
//按ctrl+Z退出输入
while(cin>>a>>b){
cout<<a+b<<endl;
}
return 0;
}#include<bits/stdc++.h>
using namespace std;
int main(){
int a;
//按ctrl+Z退出输入入
while(scanf("%d",&a)==1){
cout<<a<<endl;
}
return 0;
}#include<bits/stdc++.h>
using namespace std;
int main(){
int a;
//输入0退出输入
while(cin>>a,a){
cout<<a<<endl;
}
return 0;
}