How should I practice First Dictionary Word from Note Letters?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Compass International Holdings phone screen problems in FastPrep.

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First Dictionary Word from Note Letters

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Problem statement

Given a string note and an ordered array words, return the first word that can be formed by rearranging letters from note.

For this exercise, assume first means the smallest dictionary index; all characters are lowercase English letters; and each note occurrence may be used at most once per candidate. Candidates are checked independently, so a failed candidate consumes nothing. The needed letters may be separated and appear in any order.

For this exercise, assume every dictionary word is nonempty, the note and dictionary may be empty, and no match returns the empty string.

Function

firstWord(note: String, words: String[]) → String

Examples

Example 1

note = "tacappse"words = ["cat","bird","apple"]return = "cat"

The source1854853 input is retained; its displayed code selects cat.

Example 2

note = "tacjbcebef"words = ["cat","baby","bird","fruit"]return = "cat"

The literal source1362251 first answer is cat.

Example 3

note = "bacdrigb"words = ["cat","baby","bird","fruit"]return = "bird"

The literal source1362251 second answer is bird, using separated letters.

Constraints

For this exercise, assume 0 <= note.length <= 2000 and 0 <= words.length <= 200.
Each word contains from 1 through 500 lowercase English letters.