def length_Of_Last_Word(a):
     
    l = 0
    x = a.strip() 
    for i in range(len(x)): 
        if x[i] == " ": 
            l = 0
        else: 
            l += 1
    return l 
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