#include<iostream>
using namespace std;
{
    public:
    static int c;
    static void f(string s)
    {
        for(char x:s)if(!isalpha(x))
        {
            cout<<"Invalid input\n";
            return;
        }
        for(char &x:s)x=toupper(x);
        cout<<s<<endl;c++;
    }
};
int a::c=0;
int main()
{
    int n;
    cin>>n;string s;
    while (n--) cin>>s,a::f(s);
}