python 2.7 - How to find the position of letters in a list of words? -

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in list of words :

acquired almanac insult joke hymn gazelle amazon eyebrows affix vellum

for e.g.:how find position of 'a'; 'a'

def find_a(input):     i, c in enumerate(input):         if c == 'a': yield

will return character position of as


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