#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
char buf1[1010], buf2[1010];
int num[1010];
int main()
{
    int T, n;
    scanf("%d", &T);
    for (int t = 1; t <= T; t++)
    {
        memset(num, 0, sizeof(num));
        scanf("%s %s", buf1, buf2);
        for (int i = 0, j = strlen(buf1) - 1; j >= 0; i++, j--)
            num[i] += buf1[j] - '0';
        for (int i = 0, j = strlen(buf2) - 1; j >= 0; i++, j--)
            num[i] += buf2[j] - '0';
        for (int i = 0; i < 1005; i++)
            num[i + 1] += num[i] / 10, num[i] %= 10;
        int r = 1005;
        while (r && num[r] == 0) r--;
        printf("Case %d:\n%s + %s = ", t, buf1, buf2);
        for (int i = r; i >= 0; i--) putchar('0' + num[i]);
        printf("\n\n" + (t == T));
    }
    return 0;
}