'''problem statement given a range to n to k
1.print prime number
2.count prime number
3.sum of prime numbers'''
................................
#1.print prime number
n=int(input())
k=int(input())
for num in range(n,k+1):
	if num > 1:
		for i in range(2,num):
			if num % i==0:
				break
		else:
      print(num)
   ...........................
#2.count prime numbers
l=[]
n=int(input())
k=int(input())
for num in range(n,k+1):
	if num > 1:
		for i in range(2,num):
			if num % i==0:
				break
		else:
			l.append(num)
print(len(l))
.................................
#3.sum of prime numbers
l=[]
n=int(input())
k=int(input())
for num in range(n,k+1):
	if num > 1:
		for i in range(2,num):
			if num % i==0:
				break
		else:
			l.append(num)
print(sum(l))
...................................