#include<iostream>
using namespace std;
class A{
    public:
    static int c;
    static void f(string s){
        for(char x:s)if(!isalpha(x))
        {
            cout<<"Invalid input\n";
            return 0;
        }
        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);
}