#include<iostream> using namespace std; int main(){ int a; char b; cin>>a>>b; if(a<=1000){ c=8; }else{ if((a-1000)%500==0){ c=8=(a-1000)/500*4; }else{ c=8+(a-1000)/500*4+4; } } if(b=='y'){ c=c+5; } cout<<c; return 0; }