/*高精度*/
#include <cstdio>
#include <iostream>
using namespace std;
const int modnum=10;
int main()
{
int n;
scanf("%d",&n);
int m=n;
while(n--)
{
printf("Case %d:\n",m-n);
int a[1010]={0},b[1010]={0},c[1010]={0};
char ch1[1010],ch2[1010];
scanf("%s",&ch1);
scanf("%s",&ch2);
a[0]=strlen(ch1);
for (int i=1; i<=a[0]; i++)
a[i]=ch1[a[0]-i]-'0';
b[0]=strlen(ch2);
for (int i=1; i<=b[0]; i++)
b[i]=ch2[b[0]-i]-'0';
int x=0,i=0;
c[0]=a[0]>b[0]?a[0]:b[0];
for (int i=1;i<=c[0];i++) c[i]=a[i]+b[i];
for (int i=1;i<=c[0];i++){
c[i+1]+=c[i]/modnum;
c[i]%=modnum;
}
c[0]++;
while ((c[0] > 1) && (c[c[0]] == 0)) c[0]--;
for (int i=a[0]; i; i--) printf("%d",a[i]);
printf(" + ");
for (int i=b[0]; i; i--) printf("%d",b[i]);
printf(" = ");
for (int i=c[0]; i; i--) printf("%d",c[i]);
printf("\n");
if (n) printf("\n");
}
return 0;
}