import java.io.*;

// CS100 Fall 2000 Assignment 3.
public class Program3 {

	// Display every person in the database.
	static void showPeople() {
		int n = Person.numberOfPeople();
		for (int j=0; j < n; j++){
		    Person p = Person.intToPerson(j);
			System.out.println(p);
		}
	}
       
	// Return the person with name s in the database.
	public static Person stringToPerson(String s) {
		int n = Person.numberOfPeople();
		int j=0;

		// loop until the person is found
		while (j < n && !s.equals(Person.intToPerson(j).name()))
			j++;

		// return the person if j is valid
		if (j<n) 
			return Person.intToPerson(j);
		else 
			return null;
	}

	public static void main(String args[]) {
		// initialize Text object in to read from standard input.
		TokenReader in = new TokenReader(System.in);
                
		// take in the first command
		System.out.print("> "); 
		String s = in.readString();

		// begin the loop that processes each command
		while ( !s.equals("q")){        
                
			/* process command s. */
			if ( s.equals("b"))
				new Person(in.readString(), true);
			else if ( s.equals("g"))
				new Person(in.readString(), false);
			else if ( s.equals("?"))
				System.out.println(stringToPerson(in.readString()));                    
			else if ( s.equals("p"))
				showPeople();                   
			else if ( s.equals("m")){
				Person.marry(
					stringToPerson(in.readString()), 
						       stringToPerson(in.readString()));
			}
			else if ( s.equals("s") || s.equals("d")){
				Person mom;
				Person dad;
				Person p = stringToPerson(in.readString());
				if ( p.male() ){
					dad = p;
					mom = p.other();
				}
				else {
					mom = p;
					dad = p.other();
				}
				Person.child(mom, dad, in.readString(), s.equals("s"));
			}

			// Get next query
			System.out.print("> ");
			System.out.flush();
			s = in.readString();
		}
	}
}