#include<stdio.h>
int main()
{
int c[100],i,t=0,a,b;
scanf("%d%d",&a,&b);
if(a==0&&b==0)return 0;
while(a!=0&&b!=0)
{c[t]=a+b;t++;scanf("%d%d",&a,&b);}
for(i=0;i<t;i++)printf("%d\n",c[i]);
return 0;
}
#include<stdio.h>
int main()
{
int c[100],i,t=0,a,b;
scanf("%d%d",&a,&b);
if(a==0&&b==0)return 0;
while(a!=0&&b!=0)
{c[t]=a+b;t++;scanf("%d%d",&a,&b);}
for(i=0;i<t;i++)printf("%d\n",c[i]);
return 0;
}