program ex(f1,f2);
 type
  zn=array [0..505,0..505] of boolean;
  ka=array [1..501,1..501] of longint;
  fa=array [0..250001] of longint;
  da=record
   x,y:integer;
  end;
  la=array [1..250050] of da;
 var
  flag,flag2:zn;
  d:ka;
  c:fa;
  a:la;
  f1,f2:text;
  i,j,k,m,p,l,ans,tot,xx,yy,n1,n2,x1,y1:longint;
  head,tail,wei:longint;
 procedure bfs(left,right:longint);
  var
   i,j,k,p:longint;
  begin
   for i:=head to tail do
    begin
     if flag2[a[i].x,a[i].y] then
      begin
       inc(tot);
       c[d[a[i].x,a[i].y]]:=ans;
      end;
     if (a[i].x-1>=1)and(flag[a[i].x-1,a[i].y]=false) then
      begin
       flag[a[i].x-1,a[i].y]:=true;
       inc(wei);
       a[wei].x:=a[i].x-1; a[wei].y:=a[i].y;
      end;
     if (a[i].y-1>=1)and(flag[a[i].x,a[i].y-1]=false) then
      begin
       flag[a[i].x,a[i].y-1]:=true;
       inc(wei);
       a[wei].x:=a[i].x; a[wei].y:=a[i].y-1;
      end;
     if (a[i].x+1<=xx)and(flag[a[i].x+1,a[i].y]=false) then
      begin
       flag[a[i].x+1,a[i].y]:=true;
       inc(wei);
       a[wei].x:=a[i].x+1; a[wei].y:=a[i].y;
      end;
     if (a[i].y+1<=yy)and(flag[a[i].x,a[i].y+1]=false) then
      begin
       flag[a[i].x,a[i].y+1]:=true;
       inc(wei);
       a[wei].x:=a[i].x; a[wei].y:=a[i].y+1;
      end;
    end;
  end;

 begin
  assign(f1,'crusade.in'); reset(f1);
  assign(f2,'crusade.out'); rewrite(f2);
  readln(f1,xx,yy,n1,n2);
  tail:=0;
  for i:=1 to n1 do
   begin
    readln(f1,x1,y1);
    flag[x1,y1]:=true;
    inc(tail);
    a[tail].x:=x1; a[tail].y:=y1;
   end;
  for i:=1 to n2 do
   begin
    readln(f1,x1,y1);
    flag2[x1,y1]:=true;
    d[x1,y1]:=i;
   end;
  head:=1; wei:=tail; tot:=0; ans:=0;
  while tot<n2 do
   begin
    bfs(head,tail);
    inc(ans);
    head:=tail+1;
    tail:=wei;
   end;
  for i:=1 to n2 do
   writeln(f2,c[i]);
  close(f1);
  close(f2);
 end.