#include<bits/stdc++.h> using namespace std; int main() { int x; char c; cin>>x>>c; if (c=='y') { if(x<=1000) { cout<<8+5; exit(0); } else { cout<<8+ceil((x-1000)/500+1)*4+5; } } else { if(x<=1000) { cout<<8; exit(0); } else { cout<<8+ceil((x-1000)/500+1)*4; } } return 0; } //自己换行