#include <iostream> using namespace std; int main(){ int a; cin>>a; if( a>=90 ){ cout<<"A"; } else { cout<<" "; } if( 90>a>=80 ){ cout<<"B"; } else { cout<<" "; } if( 80>a>=70 ){ cout<<"C"; } else { cout<<" "; } if( 70>a>=60 ){ cout<<"D"; } else { cout<<" "; } if( a<60 ){ cout<<"E"; } else { cout<<" "; } return 0; }