#include <iostream>
#include <cstdlib>
#include <time.h>
 
#define NO_LETTERS ('Z' - 'A' + 1)
 
using namespace std;
 
string rot(string s, int r)
{
	for (int i = 0; i < s.size(); i++)
	{
		if (s[i] >= 'A' && s[i] <= 'Z')
		{
			s[i] = ((s[i] - 'A') + r) % NO_LETTERS + 'A';
		}
		else if (s[i] >= 'a' && s[i] <= 'z')
		{
			s[i] = ((s[i] - 'a') + r) % NO_LETTERS + 'a';
		}
	}
 
	return s;
}
 
int main()
{
    int x, k;
    string tekst;
 
    while (cin >> x >> k >> tekst)
    {
      if(x == 1)
      {
      	cout << rot(tekst, k) << endl;
      }
      else
      {
      	cout << rot(tekst, NO_LETTERS - k) << endl;
      }
    }
    return 0;
}

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1 3 krwq_KRWQ+-KrWQ
0 3 nuzt_NUZT+-NuZT