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+#include <iostream>
+#include <cmath>
+
+using namespace std;
+
+// Taken from exercise04.cpp
+bool isPrime(int n)
+{
+ double rootOfN = sqrt(n);
+ for (int i = 2; i <= rootOfN; i++)
+ {
+ if (n % i == 0)
+ return false;
+ }
+ return true;
+}
+
+void printPrimeNumberPairs(int n)
+{
+ for (int i = 2; i <= n / 2; i++)
+ {
+ if (isPrime(i) && isPrime(n - i))
+ cout << i << ", " << n - i << endl;
+ }
+}
+
+int main()
+{
+ int n;
+ cin >> n;
+
+ printPrimeNumberPairs(n);
+}