#define _CRT_SECURE_NO_DEPRECATE

#include<iostream>

#include<cstdio>

#include<cstring>

#include<algorithm>

#include<string>

#include<queue>

#include<vector>

#include<time.h>

#include<stack>

#include<cmath>

#include<functional>

#include<cstdlib>

using namespace std;

typedef long long int LL;

typedef unsigned long long int ULL;

const LL INF = 9223372036854775807L;

const int inf = 0x3f3f3f3f;

const int MAXN =  + ;

char str[MAXN],zd[MAXN];

char c1[MAXN], c2[MAXN];

int main(){

#ifdef kirito

    freopen("in.txt", "r", stdin);

    freopen("out.txt", "w", stdout);

#endif

    int start = clock();

    while (~scanf("%s",c1)){

        scanf("%s", c2);

        scanf("%s", str);

        for (int i = ; i < ; i++){

            zd[c1[i] - 'a'] = c2[i];

        }

        for (int i = ; i < strlen(str); i++){

            if (str[i] >= ''&&str[i] <= ''){

                continue;

            }

            else if (str[i] >= 'A'&&str[i] <= 'Z'){

                str[i] = (zd[str[i] - 'A'] - 'a' + 'A');

            }

            else{

                str[i] = zd[str[i] - 'a'];

            }

        }

        printf("%s\n", str);

    }

#ifdef LOCAL_TIME

    cout << "[Finished in " << clock() - start << " ms]" << endl;

#endif

    return ;

}