#include<iostream>
#include<string>
#include<cctype>
using namespace std;
class TextProcessor{
    private:
    static int validCount;
    public:
    static void processString(string str){
        bool isValid = true;
        for(char ch : str)
        {
            if(!isalpha(ch)){
                isValid = false;
                break;
            }
        }
        if(isValid){
            for(char &ch : str){
                ch = toupper(ch);
            }
            cout<<str<<endl;
            validCount++;
        }else{
            cout<<"Invalid input"<<endl;
        }
    }
    static int getvalidCount(){
        return validCount;
    }
};
int main(){
    int n;
    cin >> n;
    cin.ignore();
    string str;
    for (int i = 0;i < n;i++){
        cin>>str;
        TextProcessor::processString(str);
    }
    return 0;
}