# Exercise 6.18
import random
def coin():
    'write docstring here'
    pass # replace this with your implementation



# Problem 6.20
def reverse(phonebook):
    'write docstring here'
    pass # replace this with your implementation



# Problem 6.23
import string
def scaryDict(filename):
    'write docstring here'
    pass # replace this with your implementation



# Problem 6.27
def index(filename, words):
    'write docstring here'
    pass # replace this with your implementation



# Problem 6.30
# Assumes that module homework4Sol.py (my solutions
# for homework 4) is in the same directory as this
# file (homework7.py) 
import random, homework4Sol
def simul(n):
    'write docstring here'
    pass # replace this with your implementation



# Problem 6.33
from random import randrange
def diceprob(r):
    'write docstring here'
    pass # replace this with your implementation