Look at the default.

# Group inheritance
#
# Any inherited groups prefixed with a g: are global groups
# and are inherited from the GlobalGroups.yml.
#
# Groups without the g: prefix are groups local to this world
# and are defined in the this groups.yml file.
#
# Local group inheritances define your promotion tree when using 'manpromote/mandemote'

groups:
  Default:
    default: true
    permissions:
    - -mcmmo.defaults
    - -bending.*
    - -mcmmo.*
    - -bmt.default
    - -tr.*
    - -tr.game
    - -sg.arena
    - -sg.lobby
    - -sg.*
    - -bmt.*
    - -heavyspleef.vote
    - -heavyspleef.help.user
    - -blockhunt.player
    - -blockhunt.*
    - essentials.warp
    - essentials.warp.list
    - multiverse.portal.access.*
    - multiverse.portals.access.*
    inheritance:
    - g:groupmanager_default
    - g:essentials_default
    info:
      default: false
      prefix: '&7[&bCitizen&7]'
      build: true
      suffix: ''
  Owner:
    default: false
    permissions:
    - -vanish.*
    - -bending.*
    - '*'
    inheritance:
    - admin
    info:
      prefix: '&0&l&k[&4&lO&6&lw&e&ln&2&le&1&lr&0&l&k]&4'
      build: true
      suffix: ''
  Co-owner:
    default: false
    permissions: []
    inheritance:
    - owner
    info:
      prefix: '&0&k[&4&lCo-&8&lOwner&0&k]&4&l'
      build: false
      suffix: ''
  mod:
    default: false
    permissions: []
    inheritance: []
    info:
      prefix: ''
      build: false
      suffix: ''
  Builder:
    default: false
    permissions:
    - -mcmmo.defaults
    - -bending.*
    inheritance:
    - default
    - g:essentials_builder
    - g:towny_builder
    info:
      default: false
      prefix: '&0[&bBuilder&0]&a'
      build: true
      suffix: ''
  bh:
    default: false
    permissions:
    - -mcmmo.defaults
    - -mcmmo.*
    - -bending
    - -bending.*
    - blockhunt.player
    inheritance: []
    info:
      default: true
      prefix: ''
      build: true
      suffix: ''
  Moderator:
    default: false
    permissions:
    - worldedit.*
    inheritance:
    - builder
    - g:groupmanager_moderator
    - g:bukkit_moderator
    - g:essentials_moderator
    - g:towny_moderator
    - g:vanish_moderator
    info:
      prefix: '&5'
      build: true
      suffix: ''
  Admin:
    default: false
    permissions: []
    inheritance:
    - moderator
    - g:groupmanager_admin
    - g:bukkit_admin
    - g:essentials_admin
    - g:towny_admin
    - g:vanish_admin
    info:
      prefix: '&c'
      build: true
      suffix: ''