$R^4_{1}\quad U=\iota\quad D=\iota\quad \hbox{order 2} \quad S, c_1 = 8, c_2 = 0$\hfil\break
$R^4_{2}\quad U=((2 4 3) , \iota , \iota , \iota)\quad D=\iota\quad \hbox{order 6} \quad c_1 = 5, c_2 = 3$\hfil\break
$R^4_{3}\quad U=((2 4 3) , (1 3 4) , (1 4 2) , (1 2 3))\quad D=\iota\quad \hbox{order 3} \quad c_1 = 4, c_2 = 4$\hfil\break
$R^4_{4}\quad U=((2 4) , \iota , \iota , \iota)\quad D=\iota\quad \hbox{order 4} \quad c_1 = 6, c_2 = 2$\hfil\break
$R^4_{5}\quad U=((2 4) , \iota , (2 4) , \iota)\quad D=\iota\quad \hbox{order 4} \quad c_1 = 6, c_2 = 2$\hfil\break
$R^4_{6}\quad U=((2 4) , (1 3) , (2 4) , (1 3))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 4, c_2 = 4$\hfil\break
$R^4_{7}\quad U=((2 4) , (1 4) , \iota , (1 2))\quad D=\iota\quad \hbox{order 6} \quad c_1 = 5, c_2 = 3$\hfil\break
$R^4_{8}\quad U=((1 4 3) , \iota , (1 4 3) , (1 4 3))\quad D=\iota\quad \hbox{order 6} \quad c_1 = 5, c_2 = 3$\hfil\break
$R^4_{9}\quad U=((1 4 3) , (1 3 4) , (1 4 3) , (1 4 3))\quad D=\iota\quad \hbox{order 6} \quad c_1 = 5, c_2 = 3$\hfil\break
$R^4_{10}\quad U=((1 4 3) , (1 4 3) , (1 4 3) , (1 4 3))\quad D=\iota\quad \hbox{order 6} \quad c_1 = 8, c_2 = 0$\hfil\break
$R^4_{11}\quad U=((1 4) , \iota , \iota , (1 4))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 6, c_2 = 2$\hfil\break
$R^4_{12}\quad U=((1 4) , (2 3) , (2 3) , (1 4))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 4, c_2 = 4$\hfil\break
$R^4_{13}\quad U=((1 4) , (1 4) , \iota , (1 4))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 6, c_2 = 2$\hfil\break
$R^4_{14}\quad U=((1 4) , (1 4) , (1 4) , (1 4))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 8, c_2 = 0$\hfil\break
$R^4_{15}\quad U=((1 4 2 3) , (1 4 2 3) , (1 4 2 3) , (1 4 2 3))\quad D=\iota\quad \hbox{order 8} \quad c_1 = 8, c_2 = 0$\hfil\break
$R^4_{16}\quad U=((1 4)(2 3) , \iota , \iota , (1 4)(2 3))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 4, c_2 = 4$\hfil\break
$R^4_{17}\quad U=((1 4)(2 3) , (2 3) , (2 3) , (1 4)(2 3))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 6, c_2 = 2$\hfil\break
$R^4_{18}\quad U=((1 4)(2 3) , (1 4) , (1 4) , (1 4)(2 3))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 6, c_2 = 2$\hfil\break
$R^4_{19}\quad U=((1 4)(2 3) , (1 4)(2 3) , (1 4)(2 3) , (1 4)(2 3))\quad D=\iota\quad \hbox{order 4} \quad c_1 = 8, c_2 = 0$\hfil\break