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

class TextProcessor{
    public:
    static int count;
    static string convertToUpper(string str){
        regtex pattern("^[A-Za-z]+$");
        if(!regex_match(str,pattern)){
            return "Invalid input";
            }
            for(char &c : str){
                c=toupper(c);
            }
            count++;
            return str;
    }
};
int TextProcessor::count=0;

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