// #include <iostream>
// using namespace std;

#include <iostream.h>

/**
 **
 read()
 sort()
 compact()
 write()
 **
 **/

void read()    { cout << "read()\n";    }
void sort()    { cout << "sort()\n";    }
void compact() { cout << "compact()\n"; }
void write()   { cout << "write()\n";   }

int main() 
{
   	read();
    	sort();
    	compact();
    	write();

    	return 0;
}