#include <stdio.h>
#define LETTERS 26
#define MAXLEN 20
void codeIt(char *codeArray, char *word, char *codedWord)
{
    int current = 0,diff =0, i =0;
    char c = '\0';
    for(i=0; word[i] != '\0';i++)
    {

        if(word[i] >= 'A' && word[i] <= 'Z')
        {
             diff = word[i] - 'A';
        }
        else
        if(word[i] >= 'a' && word[i] <= 'z')
        diff = word[i] - 'a';
        else
        {
            codedWord[current++] = word[i];
            continue;
        }
        if(word[i] >= 'A' && word[i] <= 'Z')
        {
             c = codeArray[diff];
            diff = c - 'a';
            codedWord[current++] = 'A' + diff;
        }
        else
            codedWord[current++] = codeArray[diff];
    }
    codedWord[current] = '\0';
}
int main()
{
    char codeArray[LETTERS];
    char word[MAXLEN + 1];
    char codedWord[MAXLEN + 1];
    scanf("%s %s", codeArray, word);
    codeIt(codeArray, word, codedWord);
    printf("%s\n", codedWord);
    return 0;
}