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# list of similar chars
# useful for suggestion mechanism
# distance between words
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# list of similar chars
# useful for suggestion mechanism
def distanceBetweenWords (s1, s2):
"distance of Damerau-Levenshtein between <s1> and <s2>"
# https://fr.wikipedia.org/wiki/Distance_de_Damerau-Levenshtein
d = {}
nLen1 = len(s1)
nLen2 = len(s2)
for i in range(-1, nLen1+1):
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