def test_three_equal(x,y,z):
  
  result= set([x,y,z])
  if len(result)==3:
    return 0
  else:
    return (4-len(result))
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