#include <iostream>
using namespace std;
int main()
{
	int K, L, M, N;
	cin >> K >> L >> M >> N;

	if (K % 2 == 1)
		K++;

	if (M % 2 == 1)
		M++;

	if (L % 2 == 0)
		L++;

	if (N % 2 == 0)
		N++;

	int substitutes = 0;

	for (int k = K; k <= 8 && substitutes < 6; k += 2)		// [K,8]
	{
		for (int l = 9; l >= L && substitutes < 6; l -= 2)		// [9,L]
		{
			for (int m = M; m <= 8 && substitutes < 6; m += 2)		// [M,8]
			{
				for (int n = 9; n >= N && substitutes < 6; n -= 2)		// [9,N]
				{
					if (k == m && l == n)
						cout << "Cannot change the same player.\n";
					else
					{
						cout << k << l << " - " << m << n << endl;
						substitutes++;
					}
				}
			}
		}
	}

	return 0;
}