// editor1
#include<iostream>
#include<string>
using namespace std; 
class test{
    public:
    static int count;
    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;
        }
    }
};
int main() {
    int a;
    cin>>a;
    string str;
    for(int i=0;i < a;i++){
        cin>>str;
        test :: process(str);
    }
    return 0;
}