Total number of cis $N-Mn-Cl$ bond angles (that is $Mn-N$ and $Mn-Cl$ bonds in cis position) present in a molecule of cis- $\left[Mn{\left(en\right)}_{2}C{l}_2\right]$ complex is X and total number of trans $N-Mn-Cl$ in the same complex is $Y$ then X-Y is