In this task, you need to remove all words of a given length in the sentence. The number of letters in a word determine its length, for example, the length of the word "apple" is 5.

Sentence: 'a colorful stuffed bear sits on a purple outdoor bench'. Remove all words of length '4' in the given sentence.
a colorful stuffed on a purple outdoor bench

Sentence: 'a person on a surfboard in the water'. Remove all words of length '6' in the given sentence.
a on a surfboard in the water

Sentence: 'a snowboarder doing a jump and hanging on to the board'. Remove all words of length '11' in the given sentence.

a doing a jump and hanging on to the board