Alcohol Phenols And Ethers

$$ \begin{aligned} &\text { What is ' } Z \text { ' in the given set of reactions? }\\ &\mathrm{C}_6 \mathrm{H}_5 \mathrm{OCH}_3 \xrightarrow{\mathrm{HI}} X+Y \end{aligned} $$

\(Y \xrightarrow[\text { Anhy. } \mathrm{AlCl}_3]{\mathrm{C}_6 \mathrm{H}_6} \mathrm{Z}\)