program zad_1;

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
  t = array [1..4] of integer;

var
  a, b, c, d: t;
  n, i, j, cnt, flag, h, s, f, max1, maxi, min1, mini: integer;

function full(var a, b, c, d: t): integer;
begin
  maxi := a[1];
  for i := 2 to 4 do
    if (a[i] > maxi) then
      maxi := a[i];
  for i := 1 to 4 do
    if (b[i] > maxi) then
      maxi := b[i];
  for i := 1 to 4 do
    if (c[i] > maxi) then
      maxi := c[i];
  for i := 1 to 4 do
    if (d[i] > maxi) then
      maxi := d[i];
   full := maxi;
end;

function empty(var a, b, c, d: t): integer;
begin
  mini := a[1];
  for i := 2 to 4 do
    if (a[i] < mini) then
      maxi := a[i];
  for i := 1 to 4 do
    if (b[i] < mini) then
      maxi := b[i];
  for i := 1 to 4 do
    if (c[i] < mini) then
      maxi := c[i];
  for i := 1 to 4 do
    if (d[i] < mini) then
      maxi := d[i];
   empty := mini;
end;

begin
  readln(a[1], a[2], a[3], a[4]);
  readln(b[1], b[2], b[3], b[4]);
  readln(c[1], c[2], c[3], c[4]);
  readln(d[1], d[2], d[3], d[4]);
  max1 := full(a, b, c, d);
  min1 := empty(a, b, c, d);
  s := 0;
  f := 0;
  h := 0;
  for i := min1 to max1 do begin
    if (a[3] = i) then begin
      dec(s);
      inc(h);
    end;
    if (b[3] = i) then begin
      dec(s);
      inc(h);
    end;
    if (c[3] = i) then begin
      dec(s);
      inc(h);
    end;
    if (d[3] = i) then begin
      dec(s);
      inc(h);
    end;
    if (h = 2) and (s = 0) then begin
      writeln('Vertical');
      writeln(i);
      halt;
    end;
    if (h = 2) and (s <> 0) or (h > 2) or (s > 2) then
      break;
    if (a[1] = i) then
      inc(s);
    if (b[1] = i) then
      inc(s);
    if (c[1] = i) then
      inc(s);
    if (d[1] = i) then
      inc(s);
  end;
  s := 0;
  f := 0;
  h := 0;
  for i := min1 to max1 do begin
    if (a[4] = i) then begin
      dec(s);
      inc(h);
    end;
    if (b[4] = i) then begin
      dec(s);
      inc(h);
    end;
    if (c[4] = i) then begin
      dec(s);
      inc(h);
    end;
    if (d[4] = i) then begin
      dec(s);
      inc(h);
    end;
    if (h = 2) and (s = 0) then begin
      writeln('Horizontal');
      writeln(i);
      halt;
    end;
    if (h = 2) and (s <> 0) or (h > 2) or (s > 2) then
      break;
    if (a[2] = i) then
      inc(s);
    if (b[2] = i) then
      inc(s);
    if (c[2] = i) then
      inc(s);
    if (d[2] = i) then
      inc(s);
  end;
  writeln('Impossible');
  readln;
end.