instruction:
In this task, you need to reverse 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.
question:
Sentence: 'two birds standing and sticking their heads in muddy water'. Reverse all words of length '3' in the given sentence.
answer:
owt birds standing dna sticking their heads in muddy water


question:
Sentence: 'looking down at skiers holding their skis on the ski slope'. Reverse all words of length '7' in the given sentence.
answer:
gnikool down at skiers gnidloh their skis on the ski slope


question:
Sentence: 'adult teacher keeping watch on students in classroom'. Reverse all words of length '7' in the given sentence.
answer:

adult rehcaet gnipeek watch on students in classroom