The group Sq

R_{0} R_{1} R_{2} R_{3} S_{a} S_{b} S_{c} S_{d}
R_{0} R_{0} R_{1} R_{2} R_{3} S_{a} S_{b} S_{c} S_{d}
R_{1} R_{1} R_{2} R_{3} R_{0} S_{b} S_{c} S_{d} S_{a}
R_{2} R_{2} R_{3} R_{0} R_{1} S_{c} S_{d} S_{a} S_{b}
R_{3} R_{3} R_{0} R_{1} R_{2} S_{d} S_{a} S_{b} S_{c}
S_{a} S_{a} S_{d} S_{c} S_{b} R_{0} R_{3} R_{2} R_{1}
S_{b} S_{b} S_{a} S_{d} S_{c} R_{1} R_{0} R_{3} R_{2}
S_{c} S_{c} S_{b} S_{a} S_{d} R_{2} R_{1} R_{0} R_{3}
S_{d} S_{d} S_{c} S_{b} S_{a} R_{3} R_{2} R_{1} R_{0}