I am trying to achieve a glob sync pattern that allows me to meet the following criteria, but unfortunately, im having a hard time working out why the pattern isn't working.

Glob Pattern

glob.sync(./src/handlebar/{a, b, c, d}/**/*.hbs)

File Path Patterns

src/handlebar/b/a/header.hbs

src/handlebar/b/header.hbs

src/handlebar/a/head.hbs [MATCH]

src/handlebar/a/foot.hbs [MATCH]

src/handlebar/c/a/something.hbs

src/handlebar/d/a/button.hbs

What am i doing wrong?