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 Input:
A peeson taking a photo through a window at a living room.

Ex Output:
peeson


Ex Input:
theere is a giraffe that is eating a carrot from a persons hand

Ex Output:
theere


Ex Input:
A white demon hovering next to a red stop sign under a one way street ign.

Ex Output:

ign.