// editor1
#include <iostream> 
#include <string>
#include <cctype>

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

int TextProcessor::count=0;

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