Substring Consonant-Vowel Groups

Write two functions:

1. One to retrieve all unique substrings that start and end with a vowel.
2. One to retrieve all unique substrings that start and end with a consonant.

The resulting array should be sorted in lexicographic ascending order (same order as a dictionary).

Examples

get_vowel_substrings("apple")
➞ ["a", "apple", "e"]

get_vowel_substrings("hmm") ➞ []

get_consonant_substrings("aviation")
➞ ["n", "t", "tion", "v", "viat", "viation"]

get_consonant_substrings("motor")
➞ ["m", "mot", "motor", "r", "t", "tor"]

Notes

• Remember the output array should have unique values.
• The word itself counts as a potential substring.
• Exclude the empty string when outputting the array.