Hydrocarbons do not react with water but alkynes show Kucherove reaction of addition of water in the presence of 1% HgSO₄ in 30-40% H₂SO₄ at 333 K temperature. What is the final product of the following reactions?

$\mathrm{CH}\equiv \mathrm{CH}+{\mathrm{H}}_2\mathrm{O}\underset{333\text{ K}}{\overset{{\mathrm{Hg}}^{2+}/{\mathrm{H}}^{+}}{\to }}\mathrm{X}$

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{CH}+{\mathrm{H}}_2\mathrm{O}\underset{333\text{ K}}{\overset{{\mathrm{Hg}}^{2+}/{\mathrm{H}}^{+}}{\to }}\mathrm{Y}$