instruction:
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.
question:
A trqin with a yellow front next to an empty track.
answer:
trqin


question:
A cart is perched upon a wooden bench that sits on a stone patio.
answer:
cart


question:
A buolding that has a large tower that is lit up.
answer:

buolding