def perfect_squares(a, b):
    
    lists=[]
    for i in range (a,b+1):
        j = 1;
        while j*j <= i:
            if j*j == i:
                 lists.append(i)  
            j = j+1
        i = i+1
    return lists
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