Q19

Consider the augmented grammar with $\{ +, {\ast}, (,),\text{id} \}$ as the set of terminals. $S’ \rightarrow S$ $S \rightarrow S + R\; |\; R$ $R \rightarrow R {\ast} P \;| \;P$ $P \rightarrow (S)\; |\; \text{id}$ If $I_{0}$ is the set of two $\textit{LR}(0)$ items $\{ [S’ \rightarrow S.], [S \rightarrow S. + R] \}$, then $\textit{goto(closure}(I_{0}), +)$ contains exactly ______________ items.