#include <iostream>
#include <string>
#include <stdlib.h>
#include <vector>

using namespace std;


int main(int argc, char** argv)
{

	int				convert, i;
	string			word;
	char			source;
	vector<char>	chars;
	int				offset = 0;
	int				index = 0;
	char			space = ' ';
	const int		lettercount	= 26;
	string			alphabet	= "ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZ";
	
	chars.resize(0);

	if (argc > 3)
	{
		cerr << "Invalid arguments.\n";
		return 1;
	}
	
	if (strcmp("-k", argv[1]) == 0)
		word = argv[2];
	else
	{
		cout << argv[1] << endl;
		cerr << "Wrong format for offset.\n";
		return 1;
	}

	for (i = 0; i < word.size(); ++i)
		word[i] = toupper(word[i]);

	cin.get(source);
	while(!cin.eof())
	{
		source = toupper(source);
		offset = int(word[index]) - 65;
		int val = int (source);

		if ((val > 64) || (val < 91))
		{
			convert = source - 65;
			//chars.push_back( alphabet[ ( convert + offset ) ] );
			cout << alphabet[ ( convert + offset ) ];
		}
		//else
			//chars.push_back( space );

		if ( index < (word.size() - 1 ) )
			++index;
		else
			index = 0;

		cin.get(source);
	}

	for (i = 0; i < chars.size(); ++i)
		cout << chars[i];

	return 0;
}