ol {
  list-style-type: inside;
}

li:nth-child(3n),
li:nth-child(5n) {
  list-style-type: disclosure-closed;
  list-style-position: inside;
}

li:nth-child(3n):before {
  content: 'Fizz';
}

li:nth-child(5n):after {
  content: 'Buzz';
}