#include <stdio.h>
using namespace std;
int main()
{
int n,m;
while(scanf("%d%d",&n,&m)!=EOF){
if(m==0&&n==0)
break;
printf("%d\n",m+n);
}
return 0;
}
using namespace std;
int main()
{
int n,m;
while(scanf("%d%d",&n,&m)!=EOF){
if(m==0&&n==0)
break;
printf("%d\n",m+n);
}
return 0;
}