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