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.

Example Input: Sevreral adults and kids standing in the snow with skis on.
Example Output: Sevreral

Example Input: a grey cat staring silted  at windw
Example Output: windw

Example Input: An oerange umbrella upside down in a field.
Example Output:
oerange