Consider that the coordinating atoms of the ligands in cis-[Co(NH$_3$)$_4$Cl$_2$]Cl and mer-[Co(NH$_3$)$_3$Cl$_3$] octahedral complexes are at the vertices of an octahedron. The sum of total number of the triangular faces in both the complexes having one N atom and two Cl atoms at their corners is _______.