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.

[EX Q]: a dof that is sitting on the ledge of a boat.
[EX A]: dof

[EX Q]: Sevrral people are standing along side a city street.
[EX A]: Sevrral

[EX Q]: A ma is holding up his hand wearing a hat and glasses.
[EX A]:
ma