#include<bits/stdc++.h>
typedef long long ll;
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;
const int maxn = 5e5 + 100;
std::map<int, int>mp[maxn];
std::vector<int>arr[maxn];
int give[maxn];
void solve() {
    int n;
    std::cin >> n;
    bool flag = true;
    for (int i = 1; i <= n; i++) {
        int siz;
        std::cin >> siz;
        for (int j = 1; j <= siz; j++) {
            int x;
            std::cin >> x;
            mp[i][x]++;
            if (mp[i][x] == 2) {
                arr[i].push_back(x);
            }
            if (arr[i].size() > 1 or mp[i][x] > 2)
                flag = false;
        }
    }
    if (!flag) {
        std::cout << "-1\n";
        return;
    }
    std::queue<pii>que;
    for (int i = 1; i <= n; i++) {
        for (auto x : arr[i]) {
            if (mp[i][x] > 1) {
                mp[i][x]--;
                que.push({i, x});
                break;
            }
        }
    }
    while (!que.empty()) {
        auto [u, v] = que.front();
        que.pop();
        if (give[u]) {
            std::cout << "-1\n";
            return;
        }
        give[u] = v;
        int nxt = u % n + 1;
        mp[nxt][v]++;
        if (mp[nxt][v] > 1) {
            arr[nxt].push_back(v);
        }
        for (auto x : arr[nxt]) {
            if (mp[nxt][x] > 1) {
                mp[nxt][x]--;
                que.push({nxt, x});
                break;
            }
        }
    }
    for (int i = 1; i <= n; i++) {
        if (give[i])
            continue;
        int nxt = i % n + 1;
        for (auto [x, v] : mp[i]) {
            if (mp[nxt][x] <= 0 and v > 0) {
                give[i] = x;
                break;
            }
        }
        mp[nxt][give[i]]++;
        mp[i][give[i]]--;
    }
    for (int i = 1; i <= n; i++) {
        std::cout << give[i] << " \n"[i == n];
    }
}
int main() {
    std::ios::sync_with_stdio(0);
    std::cin.tie(0), std::cout.tie(0);
    int t = 1;
    while (t--)solve();
    return 0;
}