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EasyPython

String Methods — Clean and Format

PythonStrings

Implement solve(sentence) that:
1. Strips leading/trailing whitespace from the sentence.
2. Capitalizes the first letter of each word (title case).
3. Replaces every occurrence of the word "bad" (case-insensitive) with "good".
4. Returns the resulting string.

Examples

  • solve(" hello world ") → "Hello World"
  • solve("this is bad") → "This Is Good"
  • solve(" BAD habits are bad ") → "Good Habits Are Good"

Constraints

  • Words are separated by single spaces after stripping.
  • The replacement is case-insensitive but the result must always be lowercase "good".

Sample tests

Test #1Strip and title case
Input: [" hello world "]
Output: "Hello World"
Test #2Replace bad lowercase
Input: ["this is bad"]
Output: "This Is Good"
Test #3Replace multiple bad words, strip
Input: [" BAD habits are bad "]
Output: "Good Habits Are Good"
Test #4No replacement needed
Input: ["python is great"]
Output: "Python Is Great"
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