import sys def leven(s, t): if s == '': return len(t) if t == '': return len(s) s1 = s[1:] t1 = t[1:] if s[0] == t[0]: return leven(s1, t1) return 1 + min( leven(s, t1), leven(s1, t ), leven(s1, t1) ) print(leven(sys.argv[1], sys.argv[2]))
