#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
    int n;
    cin>>n;
    n%=26;
    for (int i = 1; i <= 26; i++) 
    {
	char ch = 'A' + (n + i - 1) % 26;
	cout << ch;
    }
    return 0;
}