# http://c...content-available-to-author-only...e.com/a/94351/34718
 
def f(s):
	s="\0%s\0"%s
	r=''
	for i in range(1,len(s)-1):
		if i%2:	# even (parity is changed by adding \x00 to the front)
			a=ord(s[i-1]) | ord(s[i+1])
		else:	# odd
			a=ord(s[i])
			if a%2:	# odd
				a|=ord(s[i-1])
			else:	# even
				a|=ord(s[i+1])
		r+=chr(a if a<127 else 32)
	print r
 
f("hello")
f("Hello, World!")
f("PPCG")
f("Programming Puzzles and Code Golf")
f("abcdefghijklmnopqrstuvwxyz")
f("!abcdefghijklmnopqrstuvwxyz")
f("Test 123 with odd characters. R@*SKA0z8d862")

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