The given sentence contains a typo which could be one of the following four types: (1) swapped letters of a word e.g. 'niec' is a typo of the word 'nice'. (2) missing letter in a word e.g. 'nic' is a typo of the word 'nice'. (3) extra letter in a word e.g. 'nicce' is a typo of the word 'nice'. (4) replaced letter in a word e.g 'nicr' is a typo of the word 'nice'. You need to identify the typo in the given sentence. To do this, answer with the word containing the typo.

Q: a nuber of animals on a dirt ground next to a fence

A: nuber
****
Q: A grioup of people laying on top of a sandy beach.

A: grioup
****
Q: A trqain is on the track waiting in the middle of the afternoon.

A:
trqain
****