#include <stdio.h>
#include <cstdlib>
#include <string.h>

int findIndex(char keys[], char target){
    for(int i=0;i<26;i++){
        if(keys[i]==target){
            return i;
        }
    }
}

int main(){
    int tc;
    scanf("%d",&tc);
    char temp[26];
    const char normal[27] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    for(int i=1;i<=tc;i++){
        int n,m,in,index=0;
        scanf("%d %d",&n,&m);
        char keys[n][26];
        char words[m];
        for(int j=0;j<n;j++){
            scanf("%s",temp);
            strcpy(keys[j],temp);
        }
        scanf("%s",words);
        for(int j=0;j<m;j++){
            scanf("%d",&in);
            words[j] = normal[findIndex(keys[in-1],words[j])];
        }
        printf("Case #%d: %s\n",i,words);
    }
    return 0;
}