-{[push_{sos}]} \qquad
-\langle push, s_i, s_o, s\rangle \Rightarrow
-\langle s_i, s_o, s\rangle\\
-{[roll_{sos}]} \qquad
+{[pointer_{sos}]} \qquad &
+\langle pointer, s_i, s_o, s\rangle \Rightarrow
+\langle s_i, s_o, \mathcal{D}(s)\rangle\\
+{[switch_{sos}]} \qquad &
+\langle switch, s_i, s_o, s\rangle \Rightarrow
+\langle s_i, s_o, \mathcal{D}(s)\rangle\\
+{[push_{sos}]} \qquad &
+\langle push \: n, s_i, s_o, s\rangle \Rightarrow
+\langle s_i, s_o, \mathcal{E}(n,s)\rangle\\
+{[roll_{sos}]} \qquad &