$\begin{array}{1 1} 45^{\circ},45^{\circ},135^{\circ},135^{\circ} \\65^{\circ},65^{\circ},55^{\circ},55^{\circ} \\ 55^{\circ},55^{\circ},125^{\circ},125^{\circ} \\ 75^{\circ},75^{\circ},105^{\circ},105^{\circ}\end{array} $