//https://www.facebook.com/pages/C%C3%B9ng-h%E1%BB%8Dc-l%E1%BA%ADp-tr%C3%ACnh/632038696941833
#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <fstream>
using namespace std;

class MyClass
{
public:
	MyClass(char *path = "D:/text.txt");
	MyClass(string NoiDung)
	{
		this->NoiDung = NoiDung;
		XuLy();
	}
	~MyClass();
	void DocFile()
	{
		string BienTam;
		NoiDung = "";
		while (!f.eof())
		{
			getline(f, BienTam);
			NoiDung += BienTam;
		}
		XuLy();
	}
	void TachTu()
	{
		string w = "";
		int len = NoiDung.size();
		int l = 0;
		while (l <= len)
		{
			if ((NoiDung[l] >= 'A' && NoiDung[l] <= 'Z') || (NoiDung[l] >= 'a' && NoiDung[l] <= 'z') || (NoiDung[l] >= '0' && NoiDung[l] <= '9') || (NoiDung[l] == '-'))
			{
				w += NoiDung[l];
			}
			else
			{
				if (w != "")
				{
					Tu.push_back(w);
					w = "";
				}
			}
			l++;
		}
	}
	void TachCau()
	{
		string s = "";
		int len = NoiDung.size();
		int l = 0;
		while (l < len)
		{

			if (NoiDung[l] == '.' || NoiDung[l] == '!' || NoiDung[l] == '?')
			{
				Cau.push_back(s);
				s = "";
			}
			else
				s += NoiDung[l];
			l++;
		}
	}
	void XuLy()
	{
		TachCau();
		TachTu();
	}
	vector <string> TuXuatHienNhieuNhat(int &SoLanXuatHien)
	{
		vector <string> DanhSachTuXuatHienNhieuNhat;
		string w = "";
		int BienTam = 0;
		SoLanXuatHien = 0;
		sort(Tu.begin(), Tu.end());
		int len = Tu.size();
		for (int i = 1; i < len; i++)
		{
			if (Tu[i] == Tu[i - 1])
				BienTam++;
			else
			{
				if (BienTam >= SoLanXuatHien)
				{
					if (BienTam > SoLanXuatHien)
					{
						while (!DanhSachTuXuatHienNhieuNhat.empty())
							DanhSachTuXuatHienNhieuNhat.pop_back();
					}
					DanhSachTuXuatHienNhieuNhat.push_back(Tu[i - 1]);
					SoLanXuatHien = BienTam;
				}
				BienTam = 0;
			}
		}
		return DanhSachTuXuatHienNhieuNhat;
	}
	int LaySoTu()
	{
		return this->Tu.size();
	}
	int LaySoCau()
	{
		return this->Cau.size();
	}
	string LayNoiDungCau(int i)
	{
		if (i >= Cau.size()) return "";
		return Cau[i];
	}
	vector <string> SapXep()
	{
		sort(Tu.begin(), Tu.end());
		return this->Tu;
	}
private:
	fstream f;
	string NoiDung;
	vector <string> Tu;
	vector <string> Cau;
};

MyClass::MyClass(char *path)
{
	f.open(path, ios::in);
	DocFile();
}

MyClass::~MyClass()
{
	f.close();
}

void main()
{
	int n;
	MyClass myclass;
	fstream f;
	f.open("D:/output.txt", ios::out);
	int SoCau = myclass.LaySoCau();
	f << SoCau << endl;
	for (int i = 0; i < SoCau; i++)
	{
		MyClass a(myclass.LayNoiDungCau(i));
		int SoTu, SoLanXuatHien;
		SoTu = a.LaySoTu();
		f << SoTu << endl;
	}
	vector <string> TuXuatHienNhieu = myclass.TuXuatHienNhieuNhat(n);
	while (!TuXuatHienNhieu.empty())
	{
		f << TuXuatHienNhieu[TuXuatHienNhieu.size() - 1] << " ";
		TuXuatHienNhieu.pop_back();
	}
	f << endl;
	for (int i = 0; i < SoCau; i++)
	{
		MyClass a(myclass.LayNoiDungCau(i));
		vector <string> DanhSachSapXep = a.SapXep();
		for (int i = 0; i < DanhSachSapXep.size(); i++)
			f << DanhSachSapXep[i] << " ";
		while (!DanhSachSapXep.empty()) DanhSachSapXep.pop_back();
		f << endl;
	}
	f.flush();
	f.close();
	system("D:/output.txt");
}