// editor1

#include <iostream>
#include <string>
#include <cctype>
using namespace std;

class textprocessor{
    private:
    static int count;
    
    public:
    static void upper(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++){
                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::upper(str);
    }
    return 0;
}