#include<iostream>
  using namespace std;
  int main(){
  char a;
  cin>>a;
  if(a=='A'){
  cout<<"1"<<endl;
  }
  if(a=='B'){
  cout<<"2"<<endl;
  }
  if(a=='C'){
  cout<<"3"<<endl;
  }
  if(a=='D'){
  cout<<"4"<<endl;
  }
  if(a=='E"){
  cout<<"5"<<endl;
  }
  return 0;
  }
  //AC