#include <iostream>
#include <string.h>
using namespace std;

int main()
{
	char key[27], string[81];
	int i, l;
	scanf("%s", key);
	getchar();
	gets(string);
	l = strlen(string);
	string[0] = key[string[0] + 32 - 'a'] - 32;
	for (i = 1; i < l; i++)
	{
		if(string[i] >= 'a' && string[i] <= 'z')
			string[i] = key[string[i] - 'a'];
		else 
			if (string[i] >= 'A' && string[i] <= 'Z')
				string[i] = key[string[i] + 32 - 'a'];
	}
	printf("%s", string);
	return 0;
}