Sticker icons are from OpenMoji (https://openmoji.org), licensed under
CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/).

Mapped codes (OpenMoji 15.0.0):
  rookie       1F331 seedling
  sidekick     1F91D handshake
  challenger   1F4AA flexed biceps
  strategist   1F9E0 brain
  tactician    1F3AF direct hit
  pro          1F3C5 sports medal
  elite        1F525 fire
  master       1F451 crown
  grandmaster  1F31F glowing star
  hero         1F9B8 superhero
  legend       2728  sparkles
  puzzle-god   1F3C6 trophy