#include<iostream>
#include<string>
#include<cctype>
using namespace std;
class TextProcessor{
public;
    static int Count;
    static void process(string s) {
        for(char c : s) {
            if (!isalpha(c)) {
                cout << "Invalid input"<< endl;
                return 0;
            }
        }
        for (char &c : s) {
            c = toupper(c);
        }
        cout<< s<< endl;
        count++;
    }
};

int TextProcessor::count = 0;

int main() {
    int n;
    cin>> n;
    cin.ignore();
    
    for(int i = 0;i < n;i++) {
        string s;
        getline(cin,s);
        TextProcessor::process(s);
    }
    return 0;
}