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 mountain towers over a train going down the tracks'. Remove all words of length '4' in the given sentence.
a mountain towers a train going the tracks

Sentence: 'a guy in a brown shirt has just hit a tennis ball'. Remove all words of length '3' in the given sentence.
a in a brown shirt just a tennis ball

Sentence: 'some dress shirt along with a tie and a suit hanged on a door knob'. Remove all words of length '4' in the given sentence.

dress shirt along a tie and a hanged on a