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

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

int Textprocessor::count = 0;

int main()
{
    int n;
    cin>>n;
    cin.ignore();
    
    string str;
    
    for(int i = 0; i<n; i++){
        getline(cin, str);
        Textprocessor::convertToUpper(str);
    }
    return 0;
}