include
main()
{
int k,n,a[10000],b[10000],rev=0,r,jev=0,j,s,d,dev=0;
scanf("%d",&k);
for(n=1;n<=k;n++)
{
scanf("%d%d",&a[n],&b[n]);
}
printf("\n");
for(n=1;n<=k;n++)
{
while(a[n]!=0)
{
r = a[n]%10;
rev = (rev*10)+r;
a[n] = a[n]/10;
}
while(b[n]!=0)
{
j=b[n]%10;
jev=(jev*10)+j;
b[n]=b[n]/10;
}
s=rev+jev;
while(s!=0)
{
d=s%10;
dev=(dev*10)+d;
s=s/10;
}
printf("%d\n",dev);
rev=0;
dev=0;
jev=0;
}
return 0;
}
