1 import java.util.Scanner;
2
3
4 public class Main {
5 public static void main(String[] args) {
6 Scanner cin = new Scanner(System.in);
7 int n = cin.nextInt();
8 String num1 = "";
9 String num2 = "";
10 int m = 1;
11 while(m <= n){
12 num1 = cin.next();
13 num2 = cin.next();
14 int len1 = num1.length();
15 int len2 = num2.length();
16 int lenMin = len1 < len2 ? len1:len2;
17 int lenMax = len1 > len2 ? len1:len2;
18 char[] res = new char[lenMax+1];
19 //开始进位 为 0
20 int jinwei = 0;
21 //从两个字符串的尾部开始计算
22 for(int i = 1; i <= lenMin; i++){
23 int a = num1.charAt(len1 - i) - '0';
24 int b = num2.charAt(len2 - i) - '0';
25 if(a + b + jinwei <= 9){
26 //res 的长度为 lenMax
27 res[lenMax + 1 - i] = (char)(a + b + jinwei + '0');
28 jinwei = 0;
29 }
30 else{
31 res[lenMax + 1 - i] = (char)(a + b - 10 + jinwei + '0');
32 jinwei = 1;
33 }
34 }
35 //将长字符串的值赋给res
36 if(lenMax == len1){
37 for(int j = len1 - lenMin - 1; j >= 0;j--) {
38 int a = num1.charAt(j) - '0';
39 if( a + jinwei <= 9){
40 res[j+1] = (char)(a + jinwei + '0');
41 jinwei = 0;
42 }
43 else{
44 res[j+1] = (char)(a + jinwei - 10 + '0');
45 jinwei = 1;
46 }
47 }
48 }
49 else{
50 for(int j = len2 - lenMin - 1; j >= 0;j--) {
51 int a = num2.charAt(j) - '0';
52 if( a + jinwei <= 9){
53 res[j+1] = (char)(a + jinwei + '0');
54 jinwei = 0;
55 }
56 else{
57 res[j+1] = (char)(a + jinwei - 10 + '0');
58 jinwei = 1;
59 }
60 }
61 }
62 System.out.println("Case" + " " + m + ":");
63 if(jinwei == 1){
64 res[0] = '1';
65 System.out.println(num1 + " " + "+" + " " + num2 + " " + "=" + " " + String.valueOf(res));
66 }
67 else {
68 System.out.println(num1 + " " + "+" + " " + num2 + " " + "=" + " " + String.valueOf(res, 1, lenMax));
69 }
70 if(m < n){
71 System.out.println();
72 }
73 m++;
74 }
75 cin.close();
76 }
77 }
