Grouped all together, there are currently 23 different known variations.

Sinanju, unlike the known variations of the martial arts, was not an art but a working tool.

The second state, the only known variation in the composition of the picture itself, is incomplete.

The following are examples of known variations in play, setup, and scoring:

There is a known variation in the isotopic abundance of chlorine-37.

There exists at least 200 known variations of the jutte.

All known variations of are used to write messages to another user.

There isn't enough to identify it as a known variation.

There are several known variations of tea using different additives.

It is, indeed, the oldest known variation of this tale type.