#include <bits/stdc++.h>   using namespace std;   map<string, int> Id;   char Name[107][15], Str[107][150];   int dp[107][107], last[107][107], record[107][107], vis[107];   void Show(int Step, int k) {     if (Step - 1) Show(Step - 1, last[Step][k]);     int pos = 0;     while (Str[Step][pos] !=  : ) pos++;     printf( %s%s n , Name[k], Str[Step] + pos);   }   bool Judge(char t) {     if (t >=  a  && t <=  z )       return true;     else if (t >=  A  && t <=  Z )       return true;     else if (t >=  0  && t <=  9 )       return true;     else       return false;   }   int main() {     int t, n, m;     string tmp;     scanf( %d , &t);     while (t--) {       scanf( %d , &n);       Id.clear();       for (int i = 1; i <= n; i++) {         scanf( %s , Name[i]);         Id[string(Name[i])] = i;       }       memset(record, 0, sizeof(record));       memset(vis, 0, sizeof(vis));       scanf( %d , &m);       getchar();       for (int i = 1; i <= m; i++) {         gets(Str[i]);         int pos = 0;         if (Str[i][0] !=  ? ) {           while (Str[i][pos] !=  : ) pos++;           int re = Id[string(Str[i], pos)];           record[i][re] = 1;           vis[re] = 1;           continue;         } else {           for (int j = 1; j <= n; j++) record[i][j] = 1;           while (1) {             while (!Judge(Str[i][pos]) && Str[i][pos]) pos++;             if (Str[i][pos] ==   0 ) break;             int tt = pos;             while (Judge(Str[i][pos])) pos++;             int re = Id[string(Str[i], tt, pos - tt)];             if (re || vis[re]) record[i][re] = 0;           }         }       }       memset(dp, 0, sizeof(dp));       memset(last, 0, sizeof(last));       for (int i = 1; i <= m; i++) {         if (i == 1) {           for (int j = 1; j <= n; j++) dp[i][j] = record[i][j];         } else {           for (int j = 1; j <= n; j++) {             if (!record[i][j]) continue;             for (int k = 1; k <= n; k++) {               if (j == k || !dp[i - 1][k]) continue;               last[i][j] = k;               dp[i][j] = 1;             }           }         }       }       int flag = true;       for (int i = 1; i <= n; i++) {         if (dp[m][i]) {           Show(m, i);           flag = false;           break;         }       }       if (flag) printf( Impossible n );     }     return 0;   }   