RT

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a;
	cin>>a;
	char c[100];
	cin>>c;
	for (int i=0;i<strlen(c);i++)
	{
		c[i]+=a;
		if(c[i]>122)
		{
			c[i]-=36;
		}
		cout<<c[i];
	}
}