#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 Bc : s)c=toupper(c);
        cout<<s<<endl;
    }
    }
    return 0;
}