Truncate Sentence
A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each of the words consists of only uppercase and lowercase English letters, with no punctuation.
You are given a sentence s and an integer k. You want to truncate s such that it contains only the first k words. Return s after truncating it.
Example 1
Input
s = "Hello how are you Contestant", k = 4Output
"Hello how are you"The first 4 words are "Hello", "how", "are", and "you", so the truncated sentence is "Hello how are you".
Example 2
Input
s = "What is the solution to this problem", k = 4Output
"What is the solution"The first 4 words are "What", "is", "the", and "solution", so the truncated sentence is "What is the solution".
Constraints
- 1 <= s.length <= 500
- k is in the range [1, the number of words in s].
- s consist of only lowercase and uppercase English letters and spaces.
- The words in s are separated by a single space.
- There are no leading or trailing spaces.