class Person{
	String forename;
	String surname;
	char sex;
	int age;

	void getPerson(){

	forename = Console.readString();
	surname = Console.readString();
	sex = Console.readChar();
	age = Console.readInt();
	}

	void putPerson(){
		if(sex =='m'){
			System.out.println(surname + ", " + forename + "aged " + sex + "ale" + " and " + age);
		}
		else if(sex =='f'){
			System.out.println(surname + ", " + forename + "aged " + sex + "emale" + " and " + age);
		}

	}


	boolean isYoungMale(){
		if(age>=20 && age<=30)
		{
			return true;
		}
		else{
			return false;
		}
	}

	boolean isYoungFemale(){
		if(age>=18 && age<=28){
		return true;
		}
		else{
			return false;
		}
	}

	boolean isEligible(){
		if(isYoungMale()==true){
			return true;
		}
		else if(isYoungFemale()==true){
			return true;
		}
		else{
			return false;
		}
	}

	public static void main(String [] args){
		int count = -1;
		while(!Console.EndOfFile()){

			Person p = new Person();
			p.getPerson();
			p.putPerson();
			p.isEligible();
			if(p.isEligible()==true);
				count++;
			}
			System.out.println();
			System.out.println("Number of eligibles: " + count);
	}
}