294- B

#include <iostream>
using namespace std;
int main() {
    long long int num;
    cin >> num;
    long long int sum1=0,sum2=0,sum3=0;
    long long int i,j,k,input;
    for (i=0;i<num;i++) {
        cin >> input;
        sum1 += input;
    }
    for (i=0;i<(num-1);i++) {
        cin >> input;
        sum2 += input;
    }
    for (i=0;i<(num-2);i++) {
        cin >> input;
        sum3 += input;
    }
    cout << sum1-sum2 << "\n" << sum2-sum3;
}