Write a function that returns the index of the first occurence of the word "Wally".  "Wally" must not be part of another word, but it can be directly followed by a punctuation mark.  If no such "Wally" exists, return -1.


Examples:

"Wally" => 0

"Where's Wally" => 8

"Where's Waldo" => -1

"DWally Wallyd .Wally" => -1

"Hi Wally." => 3

"It's Wally's." => 5

"Wally Wally" => 0

"'Wally Wally" => 7

Difficulty: EASY
Starter code: def wheres_wally(string):
	

Solutions:
from re import compile

def wheres_wally(string):
	m = compile("(^|.*[\\s])(Wally)([\\.,\\s']|$)").match(string)
	return m.start(2) if m else -1


import re

def wheres_wally(string):
	return next((m.start() for m in re.finditer('((?<= )W|^W)ally\\b', string)), -1)


from re import search

def wheres_wally(s):
	match = search('(?:^|\\s)Wally(?:\\W|$)', s)
	return -1 if match == None else match.start(0) + 1 if match.group(0)[0].isspace() else match.start(0)


def wheres_wally(stg):
	i = stg.find('Wally')
	while i > -1 and (i and stg[i - 1] != ' ' or stg[i + 5:i + 6].isalnum()):
		i = stg.find('Wally', i + 1)
	return i


import re

def wheres_wally(string):
	match = re.search('(?:^|\\s)(Wally)\\b', string)
	return match.start(1) if match else -1


import re

def wheres_wally(string):
	match = re.search('(?<!\\S)\\bWally\\b', string)
	return match.start() if match else -1


from re import search
wheres_wally = lambda s: (lambda r: -1 if r == None else r.start(0))(search('(^|(?<= ))Wally(\\W|$)', s))


import re

def wheres_wally(string):
	match = re.search(' Wally\\b', ' ' + string)
	if match is None:
		return -1
	else:
		return match.start()


import re

def wheres_wally(s):
	try:
		return [m.start() for m in re.finditer("(?<=\\s)Wally(\\s|[.,';+-]|\\Z)|(?<=^)Wally(\\s|[.,';+-]|\\Z)", s)][0]
	except:
		return -1