#include<iostream>
using namespace std;

class TextProcessor{
    public:
    static void process(string str){
        bool valid = true;
        
        for(int i = 0; i< str.length(); i++){
            if(!((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++){
                if(str[i] >= 'a' && str[i] <= 'z'){
                    str[i] = str[i] - 32;
                }
            }
            cout << str << endl;
             count++;
        }
        else {
            cout<<"Invalid input"<<endl;
        }
    }
};
int TextProcessor::count = 0;

int main(){
    int n;
    cin>>n;
    
    string str;
    
    for(int i = 0; i < n; i++){
        cin >> str;
        TextProcess(str);
    }
    return 0;
}