What are $A$ and $B$ in the following reaction sequence ?

$$ \mathrm{CH}_3 \mathrm{COOH} \xrightarrow{A} X \xrightarrow[\mathrm{H}^{+}]{Y} B \text { (Analgesic drug) } $$

$$ \text { Benzamide } \xrightarrow{\mathrm{Br}_2 / \mathrm{NaOH}} X \xrightarrow[\text { Alc. } \mathrm{KOH}]{\mathrm{CHCl}_3} Y $$

The conversion of $X$ to $Y$ is