def remove(list):
    import re  
     
    pattern = '[0-9]'
    list = [re.sub(pattern, '', i) for i in list] 
    return list
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