+\section{First Stage: Genomes as Lists of Homologous Classes}
+
+\section{Second Stage: to Find Closed Genomes}
+
+\section{Third Stage: Reconstruction of Ancestral Synteny Blocs for the two Closest Genomes}
+
+\section{Fourth Stage: Filling holes in the Obtained Ancestral Genome}
+
+\section{Last Stage: to Reproduce the Process until Obtaining the Last Common Ancestor of the given set of Genomes}
+