#include<iostream>
using namespace std;
class TextProcessor {
    public:
    static void process(string str){
    bool valid= true;
    for int(i=0;i<str.length();i++){
        if(!((str[i]>='a'&& str[i]<'z')||(str[i]>='A'&&str [i]<='Z'))){
            valid false;
            break;
        }
    }
    if (valid){
        for (int i=0; i<str.length(); i++{
            if (str[i]>='a'&& str[i]<'z'){
                str[i]=str[i]-32
            }
        }
        cout<<str<<endl;
        count++;
    }
    else{
        cout<<"Invalid input"<<endl;
    }
}
}