bebebeeeshka 1234567891011#include <iostream>using namespace std;int main(){    freopen("input.txt","r",stdin);    freopen("output.txt","w",stdout);    int x1, y1, x2, y2;    cin>>x1>>y1>>x2>>y2;    if ((x1+y1)%2==(x2+y2)%2) cout<<"YES";    else cout<<"NO";    return 0;}

danulpopov Var
a,b : array[1..8, 1..8]of integer;
i, j,k, x, y, x1, y1:integer;
begin
k:=-1;
for i:= 1 to 8 do
begin
k:=-k;
  for j:= 1 to 8 do
    begin
      a[i,j]:=k;
      b[i,j]:=k;
      k:= -k;
    end;
end;
Readln(x,y);
Readln(x1,y1);
if (a[x,y] = b[x1,y1]) then Writeln('YES')
  else Writeln('NO');
end.