from math import *


def zs(n):  # 朴素质数判断
    if (n == 1):
        return False
    for i in range(2, floor(sqrt(n))+1):
        if (n % i == 0):
            return False
    return True


for i in range(1, 99):
    if (zs(i) and zs(i+2)):
        print(i, i+2)