 
      
      levenshtein()
	Calculate Levenshtein distance between two strings (string_1 and string_2)	
	
levenshtein(string_1, string_2)
string_1 (string)  — A stringstring_2 (string)  — A string
number — Returns the Levenshtein distance
levenshtein("kitten", "sitting")   ' Returns 3