#include<iostreram>
using namespace std;
class TextProcessor{
    public:
    static int count;
    static void process(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++)
            {
                if(str[i]>='a' && str[i]<='z')
                {
                    str[i]=str[i]-32;
                }
            }
            cout<<str<<endl;
            count++;
        }
        else{
            cout<<"Invalid input"<<endl;
        }
    }
    
};
int Textprocessor: :count=0;
int main()
{
    int n;
    cin>>n;
    string str;
    for(int i=0;i<n;i++)
    {
        cin>>str;
        Textprocessor::process(str);
    }
    return 0;
}