class PrimaryStudent extends Student {
protected int grade;
public PrimaryStudent(String name, int age, int score, int grade) {
super(name, age, score);
this.grade = grade;
}
public int getGrade() { return grade; }
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class PrimaryStudent extends Student {
protected int grade;
public PrimaryStudent(String name, int age, int score, int grade) {
super(name, age, score);
this.grade = grade;
}
public int getGrade() { return grade; }
}