a = [4, 8, 12, 16]
result = []
b = int(input('사칙연산을 통해 얻어질 수 있는 값:'))
count = 0
for x in a :
    for y in a[count:] :
        if b == x*y or b == x-y or b == y-x or b == x/y or b == y/x or b == x+y :
            if result.count([x, y]) < 1 : 
                result.append([x, y])
    count+=1

for k in result : 
    print(k)