import math
def zhiShu(n):
    f = True
    for i in range (2, int(math.sqrt(n))+1):
        if n % i == 0:
            f = False; 
    return f and n != 1
 
for n in range (10,100):
        for i in range (4, 10):
                if i * 10 == n - (13 - i) and zhiShu(n):
                        print (int(n-13)//2 + 13,int(n-13)//2) 
/**************************************************************
	Problem: 1512
	User: admin
	Language: Python
	Result: Accepted
	Time:46 ms
	Memory:34480 kb
****************************************************************/