#include <iostream>
#include <vector>

typedef long long ll;
typedef double lf;

// #define DEBUG 1
struct IO
{
    #define MAXSIZE (1 << 20)
    #define isdigit(x) (x >= '0' && x <= '9')
    char buf[MAXSIZE], *p1, *p2;
    char pbuf[MAXSIZE], *pp;
    #if DEBUG
    #else
    IO() : p1(buf), p2(buf), pp(pbuf) {}
    ~IO() {fwrite(pbuf, 1, pp - pbuf, stdout);}
    #endif
    #define gc() (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, MAXSIZE, stdin), p1 == p2) ? ' ' : *p1++)
    #define blank(x) (x == ' ' || x == '\n' || x == '\r' || x == '\t')

    template <typename T>
    void Read(T &x)
    {
        #if DEBUG
        std::cin >> x;
        #else
        bool sign = 0; char ch = gc(); x = 0;
        for (; !isdigit(ch); ch = gc())
            if (ch == '-') sign = 1;
        for (; isdigit(ch); ch = gc()) x = x * 10 + (ch ^ 48);
        if (sign) x = -x;
        #endif
    }
    void Read(char *s)
    {
        #if DEBUG
        std::cin >> s;
        #else
        char ch = gc();
        for (; blank(ch); ch = gc());
        for (; !blank(ch); ch = gc()) *s++ = ch;
        *s = 0;
        #endif
    }
    void Read(char &c) {for (c = gc(); blank(c); c = gc());}

    void Push(const char &c)
    {
        #if DEBUG
        putchar(c);
        #else
        if (pp - pbuf == MAXSIZE) fwrite(pbuf, 1, MAXSIZE, stdout), pp = pbuf;
        *pp++ = c;
        #endif
    }
    template <typename T>
    void Write(T x)
    {
        if (x < 0) x = -x, Push('-');
        static T sta[35];
        int top = 0;
        do sta[top++] = x % 10, x /= 10; while (x);
        while (top) Push(sta[--top] ^ 48);
    }
    template <typename T>
    void Write(T x, char lst) {Write(x), Push(lst);}
} IO;
#define Read(x) IO.Read(x)
#define Write(x, y) IO.Write(x, y)
#define Put(x) IO.Push(x)

using namespace std;

const int MAXN = 110, MAXM = 1e6 + 10;

int n;
vector <int> e[MAXN];
int id[MAXN][MAXN];
bool avl[MAXN]; int ans[MAXN];

int st[MAXM][3], top;
bool f[MAXN][MAXN][MAXN], vis[MAXN][MAXN][MAXN], inq[MAXN][MAXN][MAXN];
inline bool Solve(int u, int v, int d)
{
    if (vis[u][v][d]) return f[u][v][d];
    vis[u][v][d] = 1;
    top++, st[top][0] = u, st[top][1] = v, st[top][2] = d;
    inq[u][v][d] = 1;
    if (e[u].size() != e[v].size()) return f[u][v][d] = 0;
    bool flag = 1;
    for (int i = 0, j = d; i < e[u].size(); i++, (++j == e[u].size()) && (j = 0))
    {
        int t = max(e[e[v][j]].size(), e[e[u][i]].size());
        int dd = (id[e[v][j]][v] - id[e[u][i]][u] + t) % t;
        if (inq[e[u][i]][e[v][j]][dd]) continue;
        flag &= Solve(e[u][i], e[v][j], dd);
    }
    return f[u][v][d] = flag;
}

int main()
{
    #if DEBUG
    #else
    ios::sync_with_stdio(0), cin.tie(0);
    #endif
    Read(n);
    for (int i = 1; i <= n; i++)
    {
        int m; Read(m);
        for (int j = 1, x; j <= m; j++) Read(x), e[i].push_back(x), id[i][x] = e[i].size() - 1;
    }
    for (int i = 1; i <= n; i++)
        for (int j = i + 1; j <= n; j++)
        {
            int t = max(e[i].size(), e[j].size());
            for (int k = 0; k < t; k++)
            {
                if (vis[i][j][k]) continue;
                bool cur = Solve(i, j, k);
                while (top) f[st[top][0]][st[top][1]][st[top][2]] = cur, inq[st[top][0]][st[top][1]][st[top][2]] = 0, top--;
            }
        }
    bool flag = 0;
    for (int i = 1; i <= n; i++)
        if (!avl[i])
        {
            int cnt = 0;
            ans[++cnt] = i;
            for (int j = i + 1; j <= n; j++)
            {
                int t = max(e[i].size(), e[j].size());
                if (t == 0) {ans[++cnt] = j; continue;}
                for (int k = 0; k < t; k++)
                    if (f[i][j][k]) {ans[++cnt] = j; break;}
            }
            if (cnt > 1)
            {
                for (int i = 1; i <= cnt; i++) cout << ans[i] << ' ', avl[ans[i]] = 1; cout << '\n';
                flag = 1;
            }
        }
    if (!flag) cout << "none\n";
    return 0;
}