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

int main(){
    int n;
    cin>>n;
    cin.ignore();
    while(n--){
        string s;
        getline(cin,s);
        TextProcessor::convert(s);
    }
    return 0;
}