#include<iostream>
#include<string>
#include<cctype>
using namespace std;

class Textprocessor{
    public:
    static int count;
    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;
        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::converttoupper(str);
    }
    return 0;
}