Problem/Bug Error in permissions file.

I am having trouble with my permissions.yml file and I would be grateful if someone could edit it and comment the fixed version thank you. permissions.yml:
groups:
a:
options:
default: true
prefix: '&8[&6A&8] &f'
weight: '20'
permissions:
- essentials.kit.Member
- essentials.balance
- essentials.kits.testing
- essentials.kit.Farm
- essentials.kit.Starter
- essentials.kit



b:
inheritance:
- essentials.kit.Member
- essentials.balance
- essentials.kits.testing
- essentials.kit.Farm
- essentials.kit.Starter
- essentials.kit
- a
options:
prefix: '&8[&6B&8] &f'
weight: '19'
c:
inheritance:
- essentials.kit.Member
- essentials.balance
- essentials.kits.testing
- essentials.kit.Farm
- essentials.kit.Starter
- essentials.kit
- b
options:
prefix: '&8[&6C&8] &f'
weight: '18'
d:
inheritance:
- essentials.kit.Member
- essentials.balance
- essentials.kits.testing
- essentials.kit.Farm
- essentials.kit.Starter
- essentials.kit
- c
options:
prefix: '&8[&6D&8] &f'
weight: '17'
vip:
options:
suffix: '&8[&dVIP&8]'
weight: '100'

schema-version: 1
users:
18b61fc0-be3a-4167-bb5c-85e3d49d5166:
group:
- d
- vip
options:
name: Koz4Christ
7c344935-7336-4302-8e52-33fb6531218e:
group:
- d
options:
name: CactusRanger

 

Please post your permissions.yml on http://pastebin.com/ and link the URL here. That is so that we can preserve any formatting you may have, as it is absolutely crucial to YAML files.