import re; import sys;

def rgex(string, pattern): string = re.findall(pattern, string); a = "" for x in string: a+=x; return (a); def norm(string): string = rgex(string, r'[a-zA-Z0-9]* ?'); string = rgex(string, r'\w{4,} ?');

return string.lower(); def jac(st1, st2): leno = min(len(st1), len(st2)); count = 0; for i in range(leno): if(st1[i]==st2[i]): count+=1; return count/(len(st1)+len(st2)-count)

def main(): string1 = norm(input()); string2 = norm(input()); print(jac(string1, string2));

if __name__ == "__main__": main()

achieve the same functionality without using the rgex function