// editor1
#include <iostream>
#include <string>
#include <cctype>
using namespace std;
class uppercase{
  private:
  static int count;
  
  public:
  static void converttoupper(str){
      bool valid=true;
      for(int i=0;i< str.length();i++){
          for(!((str[i]>='a' && str[i]<='z')||
          (str[i]>='A' && 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 main(){
    int n;
    cin>>n;
    cin.ignore();
    string word;
     
     for(int i=0;i<n;i++){
         cin>>word;
         uppercase::converttoupper(word);
     }
     return 0;
}