Q:

1. In 850 AD an Arab goatherd called Kaldi, took out his goats to graze. 

P. Kaldi himself had some of the berries and came to know of their effect.

Q. Kaldi noticed that they began to behave in an extra ordinary way.

R. The goats began to eat some red berries off a bush.

S. Kaldi grew curious to know what it was due to. 

6. Thus coffee was discovered.

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