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 smiling yellow cake on a white square plaet
[A]: plaet


[Q]: A vaeriety of doughnuts stacked together in a display case.
[A]: vaeriety


[Q]: A black ray holding plates of food that include sandwiches and pi.
[A]:
pi.