#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;
        TextProcessor::process(str);
    }
    return 0;
}