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

class TextProcessor {
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 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;
}