sentence

#include <iostream>
#include <vector>
#include <string>
#include <cctype>

using namespace std;

void ReadSentences(vector<string>& sentence1Words, vector<string>& sentence2Words, int wordCount) {
    for (int i = 0; i < wordCount; i++) {
        cin>>sentence1Words[i];
    }
    for (int i = 0; i < wordCount; i++) {
        cin>>sentence2Words[i];
    }
}
int main() {
    vector<string> firstSentence(20);
    vector<string> secondSentence(20);

    int wordCount;
    int i;

    cin >> wordCount;

    ReadSentences(firstSentence, secondSentence, wordCount);

    for (i = 0; i < wordCount; i++) {
        if (firstSentence[i] != secondSentence[i]) {
            cout << firstSentence[i] << " " << secondSentence[i] << endl;
        }
    }
    return 0;
}