program Project1;

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
  point=record
    x,y:extended;
  end;

function dist(a,b:point):extended;
  begin
    dist:=sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
  end;

procedure readp(var a:point);
  begin
    read(a.x,a.y);
  end;

procedure searchXY(a,b,c:extended; var x,y:extended);
  var
    p:extended;
  begin
    p:=(a+b+c)/2;
    if p*p-2*a*b<0 then
      begin
        x:=maxlongint;
        y:=maxlongint;
        exit;
      end;
    x:=(p+sqrt(p*p-2*a*b))/2;
    y:=(p-sqrt(p*p-2*a*b))/2;
  end;

var
  A,B,C:point;
  aa,bb,cc,x,y:extended;
  flagg:integer;

procedure print(a:point; x:extended; b:point; y:extended; c:point);
  var
    CA,CB:point;
  begin
    CA.x:=a.x-c.x;
    CA.y:=a.y-c.y;
    CB.x:=b.x-c.x;
    CB.y:=b.y-c.y;
    if (x/dist(a,c)*CA.x=y/dist(b,c)*CB.x)and(x/dist(a,c)*CA.y=y/dist(b,c)*CB.y) then
      begin
        flagg:=1;
        exit;
      end;
    writeln(x/dist(a,c)*CA.x+c.x:0:9,' ',x/dist(a,c)*CA.y+c.y:0:9);
    writeln(y/dist(b,c)*CB.x+c.x:0:9,' ',y/dist(b,c)*CB.y+c.y:0:9);
  end;

begin
  readp(A);
  readp(B);
  readp(C);
  aa:=dist(B,C);
  bb:=dist(A,C);
  cc:=dist(A,B);
  searchXY(aa,bb,cc,x,y);
  flagg:=0;
  if (x<aa)and(y<bb)and(x<>maxlongint) then
    begin
      writeln('YES');
      print(b,x,a,y,c);
      if flagg=0 then
      halt;
    end;
  flagg:=0;
  if (x<bb)and(y<aa)and(x<>maxlongint) then
    begin
      writeln('YES');
      print(a,x,b,y,c);
      if flagg=0 then
      halt;
    end;
  searchXY(aa,cc,bb,x,y);
  flagg:=0;
  if (x<aa)and(y<cc)and(x<>maxlongint) then
    begin
      writeln('YES');
      print(c,x,a,y,b);
      if flagg=0 then
      halt;
    end;
  flagg:=0;
  if (x<cc)and(y<aa)and(x<>maxlongint) then
    begin
      writeln('YES');
      print(a,x,c,y,b);
      if flagg=0 then
      halt;
    end;
  flagg:=0;
  searchXY(bb,cc,aa,x,y);
  if (x<bb)and(y<cc)and(x<>maxlongint) then
    begin
      writeln('YES');
      print(c,x,b,y,a);
      if flagg=0 then
      halt;
    end;
  flagg:=0;
  if (x<cc)and(y<bb)and(x<>maxlongint) then
    begin
      writeln('YES');
      print(b,x,c,y,a);
      if flagg=0 then
      halt;
    end;
  writeln('NO');
end.

I know that it's "bugcode", but..