Assignment: Eta reductions, returning functions

Given

const id  = y => y;
const fst = x => y => x;

We want to write snd such that it returns the second argument like

const snd = x => y => y;

but we can only use fst and id (not x and y) for the implementation. You might need eta operations to find the solution. The start of the function definition is added for you. Provide the function body only.

const snd = <your code will be added here>
^^^^^^^^^^^^
Do not write that initial part!

fst(id);

Your solution will be tested against:

const x_ = Math.random();
const y_ = Math.random();
snd(x_)(y_) === y_