#include<bits/stdc++.h> using namespace std; int main() { int a,b; cin>>a>>b; int c,d; cin>>c>>d; int s=0; if (c-1>=1) { s=s+1; } if(c+1<=a) { s=s+1; } if(d-1>=1) { s=s+1; } if(d+1<=b) { s=s+1; } cout<<s; return 0; }