1 /**
 2      稳定婚姻：男生不停的求婚，女生不停地拒绝
 3 **/
 4 
 5 #include <iostream>
 6 #include <queue>
 7 #include <cstdio>
 8 #include <cstring>
 9 using namespace std;
10 #define maxn 40
11 int pref[maxn][maxn],order[maxn][maxn],next[maxn];
12 int future_wife[maxn],future_huaband[maxn];
13 int man[maxn];
14 queue<int > q;
15 char str[50];
16 void engage(int man,int woman){
17     int m = future_huaband[woman];
18     if(m){
19         future_wife[m] =0;
20         q.push(m);
21     }
22     future_huaband[woman] = man;
23     future_wife[man] = woman;
24 }
25 int main()
26 {
27     int t;
28     scanf("%d",&t);
29     while(t--){
30         memset(man,0,sizeof(man));
31         int n;
32         scanf("%d",&n);
33         char  c;
34         for(int i=0;i<n;i++){//男
35             cin>>c;
36             man[c-‘a‘+1] =1;
37         }
38         for(int i=0;i<n;i++)//女
39             cin>>c;
40         for(int i=1;i<=n;i++){//男喜欢
41             cin>>str;
42         //cout<<str<<endl;
43             int temp = str[0]-‘a‘+1;//哪个男生
44             //cout<<temp<<endl;
45             for(int j=2;str[j];j++){
46                 pref[temp][j-1] = str[j]-‘A‘+1;
47                 //cout<<pref[temp][j]<<endl;
48             }
49             next[temp] = 1;
50             future_wife[temp] =0;
51             q.push(temp);
52         }
53         for(int i=1;i<=n;i++){
54             cin>>str;
55             //cout<<str<<endl;
56             int temp = str[0]-‘A‘+1;
57             for(int j=2;str[j];j++){
58                 order[temp][str[j]-‘a‘+1] = j-1;
59             }
60             future_huaband[temp] =0;
61         }
62         while(!q.empty()){
63             int man = q.front();
64             q.pop();
65             int woman = pref[man][next[man]++];
66             if(!future_huaband[woman]){
67                 engage(man,woman);
68             }else if(order[woman][man]<order[woman][future_huaband[woman]]){
69                 engage(man,woman);
70             }else
71                 q.push(man);
72         }
73         while(!q.empty()) q.pop();
74         for(int i=1;i<maxn;i++)if(man[i]){
75             printf("%c %c\n",(char)(i-1+‘a‘),(char)(future_wife[i]-1+‘A‘));
76         }
77         if(t)
78             printf("\n");
79     }
80     return 0;
81 }