program sheleplaba2;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var
x,y,a,x1,y1,perv, vtor, tret, chetv:real;
begin
  writeln('Vvedite koordinaty vershiny X Y');
  readln(x,y);
  writeln('Vvedite dlinu storony');
  readln(a);
  writeln('Vvedite koordinaty tochky X Y');
  readln(x1, y1);
  perv:=sqrt((x-x1)*(x-x1)+(y-y1)*(y-y1));
  vtor:=sqrt((x+a-x1)*(x+a-x1)+(y-y1)*(y-y1));
  tret:=sqrt((x-x1)*(x-x1)+(y-a-y1)*(y-a-y1));
  chetv:=sqrt((x+a-x1)*(x+a-x1)+(y-a-y1)*(y-a-y1));
  if ((perv=vtor) and (perv=tret) and (perv = chetv) and (vtor=tret) and (vtor=chetv) and (tret=chetv)) then
    begin
    writeln('Tochka nahoditsia na odinakovom rasstojanii ko vsem vershinam');
    readln;
    exit;
    end;
  if (perv<=vtor) and (perv<=tret) and (perv <= chetv) then
    begin
    writeln('Blizhajshaja vershina - levaja verhnija');
    readln;
    Exit;
    end;
  if (vtor<=perv) and (vtor<=tret) and (vtor <= chetv) then
    begin
    writeln('Blizhajshaja vershina - pravaja verhnija');
    readln;
    Exit;
    end;
  if (tret<=vtor) and (tret<=perv) and (tret <= chetv) then
    begin
    writeln('Blizhajshaja vershina - levaja nizhnaja');
    readln;
    Exit;
    end;
  if (chetv<=vtor) and (chetv<=perv) and (chetv <= tret) then
    begin
    writeln('Blizhajshaja vershina - pravaja nizhnaja');
    readln;
    Exit
    end;
end.