M, N = int(input()), int(input())
num = []
for i in range(N-M+1):
num.append(i+M)
dec = []
for i in num:
cnt = 0
for j in range(1, i+1):
if i % j == 0:
cnt += 1
if cnt == 2:
dec.append(i)
if len(dec) == 0:
print(-1)
else:
print(sum(dec))
print(min(dec))
m, n = map(int, input().split())
num = [i for i in range(max(2, m), n+1)] # m ~ n์ฌ์ด ์ซ์๋ฅผ ๋ฃ์ ๋ฆฌ์คํธ (๋จ, 1์ ์ ์ธ)
dec_sqr_n = [] # n์ ์ ๊ณฑ๊ทผ๊น์ง์ ๋ฒ์์์์ ์์๋ฅผ ์ง์ด ๋ฃ์ ๋ฆฌ์คํธ
for i in range(2, int(n**0.5) + 1): # 2์์ n์ ์ ๊ณฑ๊ทผ๊น์ง๋ง ๋ฐ๋ณต
if i in num:
dec_sqr_n.append(i)
num = [j for j in num if j % i != 0]
print(*(dec_sqr_n + num), sep = "\n")
def decimal(N):
n = N+1
num = [i for i in range(n, 2*N + 1)]
dec_half = []
for i in range(2, int((2*N)**0.5) + 1):
if i in num:
dec_half.append(i)
num = [j for j in num if j % i != 0]
return len(dec_half+num)
num = -1
while True:
num = int(input())
if num == 0:
break
else:
print(decimal(num))
from math import sqrt
# 1 <= n <= 123456 ์ฌ์ด ์์ฐ์๋ฅผ ๋ด์ ๋ฆฌ์คํธ ์์ฑ
num = [i for i in range(2, 123456 * 2)]
# ๋ฆฌ์คํธ num์ ์ด์ ์ฒ๋ผ ์์๋ง ์๊ฒ ๋ง๋ค์ด์ฃผ๊ธฐ.
dec_half = []
for i in range(2, int(sqrt(123456*2)) + 1):
if i in num:
dec_half.append(i)
num = [j for j in num if j%i != 0]
decimal = dec_half + num
n = -1
while True:
n = int(input())
if n == 0:
break
# decimal ๋ฆฌ์คํธ์์ ์ ๋ ฅ์ ๋ฒ์์ ํด๋นํ๋ ๊ฐ๋ค์ ๊ฐ์๋ฅผ ์ธ์ด ์ถ๋ ฅ
print(len([i for i in decimal if n < i <= 2*n]))
T = int(input())
n = [int(input()) for _ in range(T)]
num = [i for i in range(2, 10001)]
dec_half = []
for i in range(2, 100 + 1):
if i in num:
dec_half.append(i)
num = [j for j in num if j % i != 0]
decimal = dec_half + num
for i in n:
dec = []
for j in range(len(decimal)):
for k in range(j, len(decimal)):
if i == decimal[j] + decimal[k]:
dec.append([decimal[j], decimal[k]])
print(*dec[-1])
num = [i for i in range(2, 10000 + 1)]
dec_half = []
for i in range(2, 100 + 1):
if i in num:
dec_half.append(i)
num = [j for j in num if j%i != 0]
decimal = dec_half + num
T = int(input())
for i in range(T):
n = int(input())
n_half = n // 2
for j in range(n_half, 1, -1):
if j in decimal and n - j in decimal:
print(j, n - j)
break