#include <iostream>
#include <cstring>
using namespace std;
char num1[1110], num2[1110], num3[1110];
int L, M;
int mark;
void add(char a[], char b[], char c[]) {
int len1 = strlen(a);
int len2 = strlen(b);
int i, j;
int l = 0;
L = 0;
int temp;
for(i = 0; i < len1/2; i++) {
temp = a[i];
a[i] = a[len1-1-i];
a[len1-1-i] = temp;
}
for(i = 0; i < len2/2; i++) {
temp = b[i];
b[i] = b[len2-1-i];
b[len2-1-i] = temp;
}
for(i = 0; i < len1 && i < len2; i++) {
M = (a[i] - '0' + b[i] - '0' + L) % 10;
L = (a[i] - '0' + b[i] - '0' + L) / 10;
c[i] = M + '0';
}
if(i < len1) {
for( ; i < len1; i++) {
M = (a[i] - '0' + L) % 10;
L = (a[i] - '0' + L) / 10;
c[i] = M + '0';
}
}
if(i < len2) {
for( ; i < len2; i++) {
M = (b[i] - '0' + L) % 10;
L = (b[i] - '0' + L) / 10;
c[i] = M + '0';
}
}
while(L) {
c[i++] = L + '0';
L /= 10;
}
mark = i-1;
}
int main() {
int i, j;
int len1, len2;
int n,cnt = 0;
cin>>n;
while(n--){
scanf("%s%s",num1,num2);
printf("Case %d:\n",++cnt);
printf("%s + %s = ",num1,num2);
len1 = strlen(num1);
len2 = strlen(num2);
add(num1,num2,num2);
for(i = mark; i >= 0; i--)
printf("%c",num2[i]);
printf("\n");
if(n!=0)printf("\n");
}
return 0;
}
