#include <fstream>
#include <queue>

class InParser
{
#pragma warning(disable:4996)
private:
	FILE* fin;
	char* buff;
	int sp;
	char read()
	{
		++sp;
		if (sp == 4096)
		{
			sp = 0;
			fread(buff, 1, 4096, fin);
		}
		return buff[sp];
	}
public:
	InParser(const char* nume)
	{
		sp = 4095;
		buff = new char[4096];
		fin = fopen(nume, "r");
	}
	InParser& operator >> (int& n)
	{
		int sgn = 1;
		char c;
		while (!isdigit(c = read()) && c != '-');
		if (c == '-')
		{
			n = 0;
			sgn = -1;
		}
		else
			n = c - '0';
		while (isdigit(c = read()))
			n = n * 10 + c - '0';
		n *= sgn;
		return *this;
	}
};

InParser fin("interclasari.in");
class OutParser {
private:
	FILE* fout;
	char* buff;
	int sp;

	void write_ch(char ch)
	{
		if (sp == 50000)
		{
			fwrite(buff, 1, 50000, fout);
			sp = 0;
			buff[sp++] = ch;
		}
		else
			buff[sp++] = ch;
	}


public:
	OutParser(const char* name)
	{
		fout = fopen(name, "w");
		buff = new char[50000]();
		sp = 0;
	}
	~OutParser()
	{
		fwrite(buff, 1, sp, fout);
		fclose(fout);
	}

	OutParser& operator << (int vu32)
	{
		if (vu32 <= 9)
			write_ch(vu32 + '0');

		else
		{
			(*this) << (vu32 / 10);
			write_ch(vu32 % 10 + '0');
		}
		return *this;
	}

	OutParser& operator << (char ch)
	{
		write_ch(ch);
		return *this;
	}
	OutParser& operator << (const char* ch)
	{
		while (*ch)
		{
			write_ch(*ch);
			++ch;
		}
		return *this;
	}
};
OutParser fout("interclasari.out");

std::priority_queue <int> q;

int k, n, x, s;

int main()
{
	fin >> k;
	while (k--)
	{
		fin >> n;
		s += n;
		for (int i = 1; i <= n; ++i)
		{
			fin >> x;
			q.push(-x);
		}
	}
	fout << s << "\n";
	while (!q.empty())
	{
		fout << -q.top() << " ";
		q.pop();
	}
	fout << "\n";
	return 0;
}