#include<bits/stdc++.h> using namespace std; int main() { char y; int n; cin>>n>>y; if(n<=1000&&y='n'){ cout<<8; }else if(n<=1000&&y='y'){ cout<<13; }else if(n>1000&&y='n'){ if((n-1000)%500!=0){ cout<<8+(n-1000)/500*4+1; }else cout<<8+(n-1000)/500*4; if(y='y'){ if((n-1000)%500!=0){ cout<<8+(n-1000)/500*4+6; }else cout<<8+(n-1000)/500*4+5; } } return 0; }