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 bed in a adrk room in front of a window with the sun shining in.
answer:
adrk


question:
a peson jumping a skate board in the air
answer:
peson


question:
Smakl empty boat on water with birds perched on top.
answer:

Smakl