def mod(a):
   return lambda x: x % a != 0 or x == a;

def sieve(s, n):
   s = filter(mod(s[n]), s)
   if (s[n+1] > s[-1]**0.5): return s;
   else: return sieve(s, n+1)

def start(x,y):
   s = range(x, y)
   print sieve(s, 0)


x=int(input('Give start  :'))
y=int(input('Give end :'))
start(x,y)