# mode: undefined
# tag: undefined
# id: undefined (choose any default value)
# min: 0
# max: 1
# chance: 100
# group: *
items: #mode => items
    name_aa: # tag => name_aa
        id: 10 # id => 10
        group:
            - admins # saving current values(10,0,1,100) as 'name_aa' to group 'admins'
        chance: 50 # chance => 50
        group:
            - users # saving current values(10,0,1,50) as 'name_aa' to group 'users'
    max: 50 # max => 50
    name_bb: # tag => name_bb
        id: 14 # id => 14
        group:
            - admins # saving current values(14,0,50,50) as 'name_bb' to group 'admins'

AND IF IT NOT SO HARD TO DEVELOP(if you not lazy xD):
items:
     admins += (name_aa,10,0,1,100)
     users += (name_aa,10,0,1,50)