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


int main() {
    int n;
    cin>>n;
    while(n--){
        string s;
        cin>>s;
        bool valid-true;
        for(char c : s){
            if(!isalpha(c)){
                valid-false;
                break
            }
        }
        if(!valid) cout<<"Invalid input"<<endl;
        else{
            for(char &c : s)c=toupper(c);
            cout<<s<<endl;
        }
        
    }
    return 0;
}