A charged particle $\mathrm{q}$ is placed at the centre $\mathrm{O}$ of a cube of length $\mathrm{L}$ $\left(\mathrm{ABCDEFGH}\right)$. Another same charge $\mathrm{q}$ is placed at a distance $\mathrm{L}$ from $\mathrm{O}$. If the total electric flux through the cube is $6\varphi$ then the value of $\varphi$ is