#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++)
        {
            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++)
        {
            str[i]=toupper(str[i]);
        }
        cout<<str<<endl;
        cout++;
        }
         else
        {
        cout<<"Invalid input";
        }
    }
};
int textprocessor::count=0;
int main(){
    int n;
    cin>>n;
    cin.ignore();
    string str;
    for(int i =0;i<n;i++)
    {
        cin>>str;
        textprocessor::converttoupper(str);
    }
}