#include <iostream>
#include <queue>
#include <stack>
#include <string>
#include <map>
#include <vector>
#include <cstring>
#include <set>
#include <cstdio>
#include <cmath>
#include <algorithm>
using namespace std;
const int MAX=1005,INF=1<<30;
const string END="#CODE-END";
int len;
map<string,int> mymap;
map<string,int>::iterator ite;
vector<string> A,B;
int cnt;
int f[MAX][MAX];
int ma[MAX],mb[MAX];
vector<int> a,b;
int Test;
void read(vector<string> &t,vector<int> &arr){
    string s;
    while(getline(cin,s)){
        if(s==END)
            break;
        ite=mymap.find(s);
        if(ite==mymap.end())
            mymap[s]=len++;
        t.push_back(s);
        arr.push_back(mymap[s]);
    }
    return ;
}
void createM(){
    int n1=(int)a.size()-1,n2=(int)b.size()-1;
    memset(f,0,sizeof(f));
    for(int i=n1;i>=1;i--){
        for(int j=n2;j>=1;j--){
            if(a[i]==b[j])
                f[i][j]=f[i+1][j+1]+1;
            else
                f[i][j]=max(f[i+1][j],f[i][j+1]);
        }
    }
     int L=f[1][1];
     cnt=f[1][1];
    int x = -1,c=0;
    for(int i = 1; i<=n1; i++)
    {
        for(int j = 1; j<= n2; j++)
        {
            if(a[i] == b[j] && f[i][j] == L && j > x)
            {
                x = j;
                L--;
                ma[c]=i-1;
                mb[c]=j-1;
                x = j;
                c++;
                break;
            }
        }
    }
    return ;
}
struct DD{
    bool isM;
    int b,e;
};
DD DA[MAX*3],DB[MAX*3];
void cut(){
    int front=0,rear=0;
    int len=0;
    for(int i=0;i<2*cnt;i++,len++){
        rear=ma[len];
        if(front<rear){
            DA[i].isM=0;
            DA[i].b=front;
            DA[i].e=rear-1;
        }
        else {
            DA[i].isM=0;
            DA[i].b=-1;
            DA[i].e=-1;
        }
        ++i;
        DA[i].isM=1;
        DA[i].b=ma[len];
        DA[i].e=ma[len];
        front=ma[len]+1;
    }
    rear=(int)A.size();
    if(front<rear){
        DA[cnt*2].isM=0;
        DA[cnt*2].b=front;
        DA[cnt*2].e=rear-1;
    }
    else {
        DA[cnt*2].isM=0;
        DA[cnt*2].b=-1;
        DA[cnt*2].e=-1;
    }
    front=rear=0;
    len=0;
    for(int i=0;i<2*cnt;i++,len++){
        rear=mb[len];
        if(front<rear){
            DB[i].isM=0;
            DB[i].b=front;
            DB[i].e=rear-1;
        }
        else {
            DB[i].isM=0;
            DB[i].b=-1;
            DB[i].e=-1;
        }
        ++i;
        DB[i].isM=1;
        DB[i].b=mb[len];
        DB[i].e=mb[len];
        front=mb[len]+1;
    }
    rear=(int)B.size();
    if(front<rear){
        DB[cnt*2].isM=0;
        DB[cnt*2].b=front;
        DB[cnt*2].e=rear-1;
    }
    else {
        DB[cnt*2].isM=0;
        DB[cnt*2].b=-1;
        DB[cnt*2].e=-1;
    }
    return ;
}
void output(){
    for(int i=0;i<2*cnt+1;i++){
        if(DA[i].isM)
            cout<<A[DA[i].b]<<endl;
        else if(DA[i].b==-1&&DA[i].e==-1){
            if(DB[i].b==-1&&DB[i].e==-1)
                continue;
            else{
                for(int j=DB[i].b;j<=DB[i].e;j++){
                    cout<<B[j]<<endl;
                }
            }
        }
        else if(DB[i].b==-1&&DB[i].e==-1){
            if(DA[i].b==-1&&DA[i].e==-1)
                continue;
            else{
                for(int j=DA[i].b;j<=DA[i].e;j++){
                    cout<<A[j]<<endl;
                }
            }
        }
        else {
            cout<<"//**** CONFLICT STARTS ****//"<<endl
                <<"//code in A:"<<endl;
            for(int j=DA[i].b;j<=DA[i].e;j++){
                cout<<A[j]<<endl;
            }
            cout<<"//code in B:"<<endl;
            for(int j=DB[i].b;j<=DB[i].e;j++){
                cout<<B[j]<<endl;
            }
            cout<<"//***** CONFLICT ENDS *****//"<<endl;
        }
    }
    return ;
}
int main()
{
    int test=1;
    cin>>Test;
    cin.ignore();
    while(Test--){
        cout<<"Case "<<test++<<":"<<endl;
        len=0;
        mymap.clear();
        A.clear();B.clear();
        a.clear();b.clear();
        a.push_back(-1);b.push_back(-1);
        read(A,a);
        read(B,b);
        createM();
        cut();
        output();
        cout<<endl;
    }
    return 0;
}