#!/opt/anaconda1anaconda2anaconda3/bin/python

"""
Script to select random lines from a file. Reads entire file into
memory!

TODO: Replace this with a more elegant implementation.
"""
from __future__ import print_function

import random
import sys

ndesired = int(sys.argv[1])

for line in random.sample(sys.stdin.readlines(), ndesired):
    print(line, end=' ')
