
```
#include<iostream>
#include<cstring>
using namespace std;
int main(){
    char a[110];
    cin>>a;
    int n=strlen(a);
    for(int i=0;i<n;i++){
        if(a[i]>='a'&&a[i]<='z'){
            if(a[i]=='z'){
                a[i]='a';
                cout<<a[i];
                continue;
            }
            a[i]++;
        }
        cout<<a[i];
    }
    return 0;
}
```

```
#include<iostream>
#include<string>
using namespace std;
int main(){
    string a;
    cin>>a;
    for(int i=0;i<a.size();i++){
        if(a[i]>='a'&&a[i]<='z'){
            if(a[i]=='z'){
                a[i]='a';
                cout<<a[i];
                continue;
            }
            a[i]++;
        }
        cout<<a[i];
    }
    return 0;
}
```
