// editor1#
#include <iostream>
#include <string>
#include <cctype>      
using namespace std;
class textprocessor{
    private:
    static int count;
    public:
    static void converttoupper(string str)
    {
        bool valid = true;
        for(int i=0;i<str.length;i++)
        {
            for(!(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++)
            {
                str[i]= toupper(str[i]);
            }
            cout<<str<<endl;
            count++;
        }
        else
        {
            cout<<"Invalid input"<<endl;
        }
    }
};
int textprocessor::count =0;
int main()
{
    int n;
    cin>>n;
    cin.ignore();
    string str;
    for(int i=0 ; i<n ; i++)
    {
        cin>>str;
        textprocessor::converttoupper(str);
    }
    return 0;
}