#include<iostream>
#include<string>
using namespace std;
int main()
{
    string num1,num2,emp="",num3,num4;
    int t,i,l_num1,l_num2,carry=0,j,sum;
    cin>>t;
    for(i=1; i<=t; i++)
    {
        cin>>num1>>num2;
        num3=num1;num4=num2;
        if(num1.length()>num2.length())
            swap(num1,num2);

        l_num1=num1.length();
        l_num2=num2.length();
        //reverse(num1.begin(),num1.end());
        for (int b=0;b<l_num1/2;b++)
        swap(num1[b],num1[l_num1-b-1]);
        //reverse(num2.begin(),num2.end());
         for (int b=0;b<l_num2/2;b++)
        swap(num2[b],num2[l_num2-b-1]);


        for(j=0; j<l_num1; j++)
        {
            sum=((num1[j]-48)+(num2[j]-48)+carry);
            emp.push_back(sum%10+48);
            carry=sum/10;
        }

        for (int u=l_num1;u<l_num2;u++)
    { int sum = ((num2[u]-48)+carry);
        emp.push_back(sum%10+48);
        carry=sum/10;
    }



        if(carry)
            {emp.push_back(carry+48);}
        //reverse(emp.begin(),emp.end());
        int l_emp=emp.length();
         for (int b=0;b<l_emp/2;b++)
        swap(emp[b],emp[l_emp-b-1]);

        cout<<"Case "<<i<<":"<<endl;
        cout<<num3<<" + "<<num4<<" = "<<emp<<endl;
        if(i==t);
        else cout<<endl;
        carry=0;emp="";
    }






}