// Example program
#include <iostream>
#include <string>

using namespace std;

int main()
{
  char slovo;

  cin>>slovo;

  for(int i=0; i<3; i++)
    {
        slovo+=1;
        if (slovo>=65 && slovo<=90)
            cout<<slovo<<endl;

        else
        {
            slovo=65;
            cout<<slovo<<endl;
        }
    }

    return 0;
}