#!/usr/bin/env python
# -*- coding: utf-8 -*-

import fileinput
import sys
import json
field = sys.argv[1]

for line in sys.stdin:
    j = json.loads(unicode(line.decode("utf-8")))

if not isinstance(j, list):
    j = [j]

for i in j:
    for f in field.split('.'):
        i = i.get(f, None)
        if i == None: 
            break
    if i != None:
        print i


