//-----------------------------------------------------------------------
//	File:		cipher.cc
//	Description:	Encode text using modified caesar cipher
//	Author:		Chau-Wen Tseng (tseng@cs.umd.edu)
//-----------------------------------------------------------------------

#include <stdlib.h>
#include <iostream.h>
#include <assert.h>
#include "apstring.h"
#include "apstring.cpp"

//-----------------------------------------------------------------------
//  main
//-----------------------------------------------------------------------

int main()
{
	apstring key;
	apstring buf;
	char code[100];  // max string is 100 chars
	int i,len,klen;
	unsigned int c;

	cin >> key;
	klen = key.length();

	cin >> buf;
	while (buf != "-1") {  // look at each string

		len = buf.length();
		for (i = 0; i < len; i++) {
			c = (unsigned int) (buf[i] + key[i%klen] - 'a');
			if (c > (unsigned int) 'z')
				c -= 26;  // 26 letters
			code[i] = (char) c;
		}
		assert(i < 100);
		code[i] = '\0';
		cout << code << "\n";
		cin >> buf;
	}
}