#!/usr/bin/env python

# -*- coding: utf-8 -*-

import os 
import urllib
import urllib2
import json
import sys

features = []

for dirname, dirnames, filenames in os.walk(sys.argv[1]):
	for filename in filenames:
		fp = open(sys.argv[1]+'/'+filename)
		JSON = json.load(fp)
		features.append(JSON.items()[3][1])

print json.dumps(features, sort_keys=True, indent=4)