#!/usr/bin/env python

import os
import sys

for i in range(len(sys.argv)-1):
    arg = sys.argv[i+1]
    if arg.startswith('$'):
        arg = os.environ.get(arg[1:], '')
    if i > 0:
        sys.stdout.write(' ')
    sys.stdout.write(arg)

sys.stdout.write('\n')
sys.exit(0)
