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

class TextProcessor {
    public:
    static int count;
    
    static bool valid(string s){
        for(char c : s)
        if(!isalpha(c) && c!='');
        return false;
        return true;
    }
    static void convert(string s){
        if(!valid(s)){
            cout<<"Invalid input\n";
            return;
        }
        for(char &c : s) c = toupper(c);
        cout<<s<<"\n";
        count++;
    }
};
int TextProcessor::count = 0;

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