#!/usr/bin/python3.6


'''If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Finish the solution so that it returns the sum of all the multiples of 3 or 5 below the number passed in.

Note: If the number is a multiple of both 3 and 5, only count it once.'''


def natural_numb(numbs):
	val = 0
	for item in range(numbs):
		if item % 3 == 0 or item % 5 == 0:
			print(item)
			val += item
	return val
print(natural_numb(20))
