// editor1
#include <iostream>
#include <string>
#include <cctype>
using namespace std;
class TextProcessor{
    private:
    static int count;
    public:
    static void convertToUpper{
        bool valid = true;
        
        for(int i = 0; i< str.length(); i++){
            for(!(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++){
                str[i] = toupper(str[i]);
            }
            cout<<str<<endl;
            count++;
        }
        else{
            cout<<"Invalid input"<<endl;
        }
    }
};

int TextProcessor::count = 0;

int main(){
    int n;
    cin>>n;
    cin.ignore();
    
    string str;
    
    for(int i = 0; i<n; i++){
        cin>>str;
        TextProcessor::convertToUpper(str);
    }
    return 0;
}