Each class must be in a namespace of at least one level (a top-level vendor name)

Opening brace must not be followed by a blank line

Opening brace of a class must be on the line after the definition

Visibility must be declared on method "letterCombinations"

Opening brace should be on a new line

Function closing brace must go on the next line following the body; found 1 blank lines before brace

Visibility must be declared on method "backtrack"

Opening brace should be on a new line

The closing brace for the class must go on the next line after the body

Expected 1 newline at end of file; 0 found

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2, tinovyatkin/action-php-codesniffer@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.