#include <iostream>
#include <string>
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;
       }
   }
};

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;
}