#include <iostream>
#include <algorithm>
#include <string.h>
#include <stdio.h>
using namespace std;
const int MAX = 1010;
char s1[MAX],s2[MAX];
int s[MAX];
int main()
{
int n, c, m, count = 1;
scanf("%d ",&n);
for(int l=0; l<n; l++)
{
memset(s1, ‘\0‘, sizeof(s1));
memset(s2, ‘\0‘, sizeof(s2));
memset(s,0,sizeof(s));
scanf("%s", s1);
scanf("%s", s2);
int i = strlen(s1);
int j = strlen(s2);
reverse(s1, s1+i);
reverse(s2, s2+j);
int k = i>j?i:j;
if(i>=j)
{
c = 0;
for(m=0; m<j; m++)
{

s[m] = s1[m]-‘0‘+s2[m]-‘0‘+c;
c = s[m]/10;
s[m] = s[m]%10;
}
for(m=j; m<i; m++)
{
s[m] = s1[m]-‘0‘+c;
c = s[m]/10;
s[m] = s[m]%10;
}

}
else
{
c = 0;
for(m=0; m<i; m++)
{

s[m] = s1[m]-‘0‘+s2[m]-‘0‘+c;
c = s[m]/10;
s[m] = s[m]%10;
}
for(m=i; m<j; m++)
{
s[m] = s2[m]-‘0‘+c;
c = s[m]/10;
s[m] = s[m]%10;
}
}
if(c)
s[k] = c;
else
k--;
reverse(s1, s1+i);
reverse(s2, s2+j);
cout<<"Case "<<count<<":"<<endl;
cout<<s1<<" "<<"+"<<" "<<s2<<" "<<"="<<" ";
for(i=k; i>=0; i--)
{
cout<<s[i];
}
if(count<n)
{
cout<<endl<<endl;
}
else
cout<<endl;
count++;
}

return 0;
}