#include <iostream>

#include <cstdio>

#include <string.h>

using namespace std;

const int MX = +;

char a[MX], b[MX];

int c[MX];

int main()

{

    int cas = ;

    int T;

    scanf("%d", &T);

    while(T--)

    {

        memset(a, , sizeof(a));

        memset(b, , sizeof(b));

        memset(c, , sizeof(c));

        scanf("%s %s", &a, &b);

        int lena = strlen(a);

        int lenb = strlen(b);

        int tmp;

        int v = , k = ;

        for(int i = lena-, j = lenb-;; --i, --j)

        {

            if(i <  && j < ) break;

            if(i < ) tmp = b[j]-''+v;

            else if(j < ) tmp = a[i]-''+v;

            else tmp =(a[i]-'')+(b[j]-'')+v;

            c[k] = tmp % ; //取个位

            v = tmp/; //取要进的位

            if(((i == )&&(j <= ) || (j == )&&(i <= )) && v != ) c[++k] = v;

            k++;

        }

        printf("Case %d:\n", ++cas);

        printf("%s + %s = ", a, b);

        for(int i = k-; i >= ; --i) printf("%d", c[i]);

        if(T) printf("\n\n");

        else printf("\n");

    }

}