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\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\tikzset{
ufnode/.style={
circle,
draw,
thick
},
ufedge/.style={
-latex,
thick
}
}
\begin{tikzpicture}
\draw
(0,1) node[ufnode] (n0) {0}
(1,2) node[ufnode] (n1) {1}
(2,1) node[ufnode] (n2) {2}
(5,1) node[ufnode] (n3) {3}
(6,2) node[ufnode] (n4) {4}
(7,1) node[ufnode] (n5) {5}
(7,0) node[ufnode] (n6) {6}
(10,1) node[ufnode] (n7) {7}
(10,2) node[ufnode] (n8) {8}
(13,2) node[ufnode] (n9) {9}
;
\draw[ufedge] (n0) -- (n1) ;
\draw[ufedge] (n2) -- (n1) ;
\draw[ufedge] (n1) edge[loop above] (n1) ;
\draw[ufedge] (n3) -- (n4) ;
\draw[ufedge] (n5) -- (n4) ;
\draw[ufedge] (n6) -- (n5) ;
\draw[ufedge] (n4) edge[loop above] (n4) ;
\draw[ufedge] (n7) -- (n8) ;
\draw[ufedge] (n8) edge[loop above] (n8) ;
\draw[ufedge] (n9) edge[loop above] (n9) ;
\end{tikzpicture}
\end{document}