Sheep Twist English Tongues

Baah-baah bääh babaah bäbaeh baaaah is one of the most difficult tongue twisters in Bleatish - my sheep language, don't even bother to pronounce it.

But even in English sheep are involved in twisting human tongues.
The following tongue twister is said to be the most difficult tongue twisters in English:

The sixth sick sheik's sixth sheep's sick

If your tongue still feels ultimately relaxed after repeating the above sentense for sixty-six times, you can try more tongue twisters here.