dddd

#include <bits/stdc++.h>
using namespace std;
int main(){
int n;
string a;
cin>>n>>a;
for(int i=0;i<a.size();i++){
if(a[i]>='z'-n+1){
a[i]=(abs('z'-(a[i]+n))-1)%26;
a[i]+='a';
cout<<a[i];
}else{
a[i]+=n;
cout<<a[i];
}
}
return 0;
}