AC

#include<iostream>
using namespace std;
int main(){
string s;
getline(cin,s);
for(int i=0;i<s.size();i++){
if(s[i]>='a' and s[i]<='y' || s[i]>='A' and s[i]<='Y'){
s[i]+=1;
}
else if(s[i]'z' || s[i]'Z'){
s[i]-=25;
}
}
cout<<s;
return 0;
}