#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]<= 'Z'))){
                valid = false;
                break;
            }
        }
        if(valid){
            for(int i = 0; i < str.length(); i++)[
                str[i]= toupper(str[i]);
        }
        cout<< str << endl;
        cout++;
    }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;
}