#include <iostream>
#include <cctype>
#include <stdio.h>
#include <bits/stdc++.h>

using namespace std;
const int BUFSIZE = 1 << 16, INF = (1 << 30) - 1 + (1 << 30);
char rBuf[BUFSIZE], wBuf[BUFSIZE];
int wPos, rPos;
int Pow10[11] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, INF};  ///intrebare legata de asta: dc nu merge sa pun in vector 1e2

FILE *fin, *fout;

inline void initRBuf();
inline void initWBuf();
inline char getChar();
inline void putChar(char ch);
inline void flushWBuf();
inline int getInt();
inline void writeInt(int nr);


struct cmp
{
    public : bool operator()(const int a, const int b) const
    {
        return a > b;
    }
};
priority_queue<int, vector<int>, cmp> myHeap;



int main()
{
    fin = fopen("interclasari.in", "r");
    initRBuf();
    initWBuf();
    int k, n, i, j, s = 0;
    k = getInt();
    for (i = 0; i < k; i++)
    {
        n = getInt();
        s += n;
        for (j = 0; j < n; j++)
            myHeap.push(getInt());
    }
    fclose(fin);

    fout = fopen("interclasari.out", "w");
    writeInt(s);
    putChar('\n');
    while (!myHeap.empty())
    {
        writeInt(myHeap.top());
        putChar(' ');
        myHeap.pop();
    }
    flushWBuf();
    fclose(fout);

    return 0;
}


inline void initRBuf() { rPos = BUFSIZE - 1; }
inline void initWBuf() { wPos = -1; }
inline char getChar()
{
    if (++rPos == BUFSIZE)
    {
        rPos = 0;
        fread(rBuf, 1, BUFSIZE, fin);
    }
    return rBuf[rPos];
}
inline void putChar(char ch)
{
    if (++wPos == BUFSIZE)
    {
        wPos = 0;
        fwrite(wBuf, 1, BUFSIZE, fout);
    }
    wBuf[wPos] = ch;
}
inline void flushWBuf() { fwrite(wBuf, 1, wPos + 1, fout); }
inline int getInt()
{
    char ch;
    int res = 0;
    while (!isdigit(ch = getChar()));
    do
        res = res * 10 + ch - '0';
    while (isdigit(ch = getChar()));
    return res;
}
inline void writeInt(int nr)
{
    int i = 1, cf;
    while (Pow10[i] <= nr)
        i++;
    i--;
    for (; i >= 0; i--)
    {
        cf = 0;
        while (nr >= Pow10[i])
        {
            cf++;
            nr -= Pow10[i];
        }
        putChar(cf + '0');
    }
}