So the derivation is 1, 4.

Here I've shown another derivation starting with sentence.

A half thereof, or abate a little thereof,

A half thereof, or abate a little thereof

What I've done here is what's called a derivation.

Or lack thereof.

And produced therefrom the water thereof and the pasture thereof,

Verily upon us is the collecting thereof and the reciting thereof.

And inspired it with the wickedness thereof and the piety thereof,

And then I'm updating the derivation with the rule I used.

Lo! upon Us (resteth) the putting together thereof and the reading thereof.

This is a KDF, a key derivation function that's built from HMAC.

The shade thereof is close upon them and the clustered fruits thereof bow down.

And He made dark the night thereof, and He brought forth the morn thereof.

And other torments, like thereof, conjoined.

And make denial thereof your livelihood?

The way that's done, is using a mechanism called a key derivation function, KDF.

And close upon them will be the shades thereof, and low will hang the clusters thereof greatly.

Instead of enumerating just the strings, we're going to enumerate strings along with their derivation.

It was a kind of joke, because it's got a double derivation from the Greek.

that thereof you may thread ways, ravines.

and He fears not the issue thereof.

Stiff necked, discoursing thereof by night, reviling.

And He feared not the consequence thereof

If you don't remember or haven't seen this syntax before, this says I'm going to take the first and second values out of tokens and derivation and put them in the tuple (tokens, derivation).

Once we've enumerated all the derivations, we can check more than 1 derivation for that string.

Wherein art thou concerred with the declaration thereof!

And admixture thereof will be Water of Tasnim

And He (Allah) feared not the consequences thereof.

In scorn thereof. Nightly did ye rave together.

That ye may thread the valley ways thereof.

Then lo! upon Us (resteth) the explanation thereof.

He raised the height thereof and ordered it

And He does not fear the consequence thereof.

Wherein art thou (concerned) with the declaration thereof?

And the shade thereof is close upon them, and the bunches of fruit thereof will hang low within their reach.

The key derivation function would just work as follows. It would take as input the source key.

Whereof one cannot speak, thereof one must be silent.

Whereof one cannot speak, thereof one must be silent.

They said we found our fathers the worshippers thereof.

Wherefore when We reciteit, follow thou the reciting thereof.

He hath raised the height thereof and perfected it.

When the earth is shaken by the shaking thereof,

But observe the measure strictly, nor fall short thereof.

Why (ask they)? What hast thou to tell thereof?