// editor1
 #include <iostream>
 using namespace std;
 class TextProicessor
 {
     public :
     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;
             cout++;
         }
         else
         {
             cout<<"Invalid input"<<endl;
         }
     }
 };
  int TextProicessor::count =0;

 int main()
 {
    int n;
    cin>>n;
    string str;
    for(int i=0 ; i<n; i++)
 {
     cin>>str;
     TextProicessor::process(str);
 }
 return 0;
 }