def replace(string, char):
    import re 
     
    pattern = char + '{2,}'
    string = re.sub(pattern, char, string) 
    return string 
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result