%\begin{equation}\label{eq:candidates}
\begin{figure}[h!]
\begin{center}
\begin{tikzpicture}[scale=.6]
%
\begin{scope}[yshift=4cm]
\begin{scope}[xshift=0cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[xshift=5mm,yshift=5mm,line width=2pt,orange](0,-.5)--(0,1)--(2,1)--(2,2)--(3.5,2);
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$0$}}
(1,2)node{{$1$}}
(2,2)node{{$2$}}
(3,2)node{{$3$}}
(0,1)node{{$1$}}
(1,1)node{{$2$}}
(2,1)node{{$2$}}
(0,0)node{{$1$}};
\end{scope}
%
\begin{scope}[xshift=5.5cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[xshift=5mm,yshift=5mm,line width=2pt,orange](1,.5)--(1,2)--(3.5,2);
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$0$}}
(1,2)node{{$1$}}
(2,2)node{{$1$}}
(3,2)node{{$2$}}
(0,1)node{{$0$}}
(1,1)node{{$1$}}
(2,1)node{{$1$}}
(0,0)node{{$0$}};
\end{scope}
%
\begin{scope}[xshift=11cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[xshift=5mm,yshift=5mm,line width=2pt,orange](2,.5)--(2,1)--(2.5,1);
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$0$}}
(1,2)node{{$0$}}
(2,2)node{{$0$}}
(3,2)node{{$1$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$1$}}
(0,0)node{{$0$}};
\end{scope}
%
\begin{scope}[xshift=16.5cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[xshift=5mm,yshift=5mm,line width=2pt,orange](3,1.5)--(3,2)--(3.5,2);
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$0$}}
(1,2)node{{$0$}}
(2,2)node{{$0$}}
(3,2)node{{$1$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$0$}}
(0,0)node{{$0$}};
\end{scope}
%
\begin{scope}[xshift=22cm]
%\fill[yellow]
%(3,2)--(4,2)--(4,3)--(3,3)
%(1,2)--(2,2)--(2,3)--(1,3)
%(1,1)--(2,1)--(2,2)--(1,2)
%(0,0)--(1,0)--(1,1)--(0,1);
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$0$}}
(1,2)node{{$0$}}
(2,2)node{{$0$}}
(3,2)node{{$0$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$0$}}
(0,0)node{{$0$}};
\end{scope}
\end{scope}
%
\begin{scope}[yshift=0cm]
\begin{scope}[xshift=0cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$0$}}
(1,2)node{{$0$}}
(2,2)node{{$0$}}
(3,2)node{{$0$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$0$}}
(0,0)node{{$0$}};

\end{scope}
%
\begin{scope}[xshift=5.5cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$1$}}
(1,2)node{{$0$}}
(2,2)node{{$0$}}
(3,2)node{{$0$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$0$}}
(0,0)node{{$0$}};

\end{scope}
%
\begin{scope}[xshift=11cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$1$}}
(1,2)node{{$1$}}
(2,2)node{{$0$}}
(3,2)node{{$0$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$0$}}
(0,0)node{{$0$}};
\end{scope}
%
\begin{scope}[xshift=16.5cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$1$}}
(1,2)node{{$1$}}
(2,2)node{{$0$}}
(3,2)node{{$0$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$1$}}
(0,0)node{{$0$}};
\end{scope}
%
\begin{scope}[xshift=22cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$1$}}
(1,2)node{{$1$}}
(2,2)node{{$0$}}
(3,2)node{{$1$}}
(0,1)node{{$0$}}
(1,1)node{{$0$}}
(2,1)node{{$1$}}
(0,0)node{{$0$}};
\end{scope}
\end{scope}
%
\end{tikzpicture}
\end{center}
\caption{}
\label{fig:pic_hg}
\end{figure}
%\end{equation}