import math;
def wanmeishu(n):
   s = 0;
   for i in range(1,n):
      if n % i == 0:
         s += i;
   return s == n;

a,b = map(int,input().split());
for i in range(a,b+1):
       if wanmeishu(i) == True:
              print(i);
             
       

/**************************************************************
	Problem: 1136
	User: admin
	Language: Python
	Result: Accepted
	Time:95 ms
	Memory:34480 kb
****************************************************************/