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Filter API allows you to replace the short tokens in the content with the HTML block. Implement a filter that replaces the token in any text formats to "Name: LASTNAME FIRSTNAME" using the Filter API.

For example:
Token: [name:john:doe]
Result: Name: doe john

Deliverables A filter which replaces the "[name:FIRSTNAME:LASTNAME]" token to "Name: LASTNAME FIRSTNAME"

Hint: Use the regular expression to detect the pattern.

Resources Filter API overview

Creating a Custom Filter in Drupal 8