#!/usr/bin/python3

import random
uniform_list=[]
gaussian_list=[]

def fill_uniform(a,b):
	global uniform_list
	uniform_list=[random.randint(a,b-1) for _ in range (2*b)]

def fill_gaussian(a,b):
	global gaussian_list
	count=2*b
	while len(gaussian_list)<count:
		x=int(random.gauss((a+b)/2, (b-a)/6))
		if a<=x<=b:
			gaussian_list.append(x)
def find_eq_pos():
	ml=[]
	for i,(u,g) in enumerate(zip(uniform_list,gaussian_list)):
		if u==g:
			ml.append(i)
	return ml
def main():
	a=None
	b=None
	while True:
		try:
			a=int(input("a"))
			b=int(input("b"))
			if a>=b:
				raise ValueError("a<b")
			if b<=10:
				raise ValueError("b>10")
			break
		except Exception as e:
			print(F"error {e}")
			exit(1)

	fill_gaussian(a,b)
	fill_uniform(a,b)
	matches=find_eq_pos()
	print(matches)
if __name__=="__main__":
	main()