#include<iostream>
#include<string>
#include<cctype>
using namespace std;
class TextProcessor
{
    private:
    static int count;
    public:
    static void converToupper(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 = flase;
            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 main()
{
    int n;
    cin>>n;
    cin.ignore();
    string str;
    
    for(int i=0;i<n;i++)
    {
        cin>>str;
        TextProcessor::convertToUpper(str);
    }
    return 0;
}