from __future__ import division, print_function
import json

with file('TNET.json') as f:
    data = json.load(f, 'utf-8')

commentors = {}

for x in data:
    commentors.setdefault(x['name'].encode('utf-8'), []).append(x['likes'])

for x in commentors:
    dat = commentors[x]
    print(len(dat), sum(x+1 for x in dat), sum(x+1 for x in dat)/len(dat), x, sep=':')