Group words by length

mediumDictionaries20 XP

Return a dictionary (JavaScript: object) that maps each word length to the list of words with that length, in their original order. Use the length as a key; in the expected answers it is written as a string, because JSON keys are strings.

Examples

Input: words = ["hi", "cat", "hello", "yo", "dog"]
Output: {"2": ["hi", "yo"], "3": ["cat", "dog"], "5": ["hello"]}
Input: words = []
Output: {}

Examples use JSON: true/false/null are True/False/None in Python.