

#include<stdio.h>
#define max 20
int main()
{
int n,i;
__int64 a[max],b[max],sum[max];
scanf("%d",&n);
if(n>=1&&n<=max)
{
getchar();
for(i=0;i<n;i++)
{
scanf("%I64d %I64d",&a[i],&b[i]);
sum[i]=a[i]+b[i];
}
getchar();
for(i=0;i<n;i++)
printf("\ncase %d:\n%I64d+%I64d=%I64d\n",i+1,a[i],b[i],sum[i]);
printf("\n");
}
return 0;
}