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

using namespace std;


int main(int argc, char** argv)
{
	int		offset = 0;
	int		convert;
	char*	offsetfile;
	char	source;

	const int	lettercount	= 26;
	string		alphabet	= "ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZ";

	if (argc > 3)
	{
		cerr << "Invalid arguments.\n";
		return 1;
	}
	
//	if (strcmp("-k", argv[1]) == 0)
//		offset = atoi(argv[2]);
//	else if (strcmp("-K", argv[1]) == 0)
//		offsetfile = argv[2];
//	else
//	{
//		cout << argv[1] << endl;
//		cerr << "Wrong format for offset.\n";
//		return 1;
//	}
	offset = atoi(argv[1]);
	if(offset < 0 || offset >= 26) {offset = 0; }

	offset = offset % lettercount;

	while(cin.get(source))
	{
		source = toupper(source);
		int val = int (source);
		if ((val > 64) && (val < 91))
		{
			convert = val - 65;
			cout << alphabet[(convert + offset)];
		}
	}
	return 0;
}