#include <iostream>
using namespace std;
 
const int MAX_SIZE = 1200;
const int MAX_VALUE = 100000;
 
int main() {
	int sentDataSize, missingDataSize, sentData[MAX_SIZE], recievedData[MAX_SIZE];
	cin >> sentDataSize >> missingDataSize;
	for (int i = 0; i < sentDataSize; ++i) {
		cin >> sentData[i];
	}
	for (int i = 0; i < sentDataSize - missingDataSize; ++i) {
		cin >> recievedData[i];
	}
	int succeed = 1;
	for (int i = 0; i < sentDataSize; ++i) {
		int sent = 0;
		for (int j = 0; j < sentDataSize - missingDataSize; ++j) {
			if (sentData[i] == recievedData[j]) {
				sent = 1;
				recievedData[j] = MAX_VALUE + 1;
				j = sentDataSize;
			}
		}
		if (!sent) {
			cout << sentData[i] << " ";
			succeed = 0;
		}
	}
	if (succeed) {
		cout << "Nu s-au pierdut date";
	}
	return 0;
}

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