class NoSuchStudentException(Exception):
    """Виняток, що викликається, якщо ім'я учня не знайдено в саду."""
    pass


class Garden:
    # Правильна назва константи з літерою 'a' (DEFAULT)
    DEFAULT_STUDENTS = [
        "Alena", "Boris", "Cyril", "Daniel", 
        "Eva", "František", "Gitka", "Helena", 
        "Ivana", "Jozef", "Karol", "Ladislav"
    ]
    
    PLANT_MAP = {
        "G": "Tráva",
        "C": "Ďatelina",
        "R": "Reďkovky",
        "V": "Fialky"
    }

    def __init__(self, diagram: str, students: list[str] = None):
        self.rows = diagram.splitlines()
        
        
        if students is not None:
            self.students = sorted(students)
        else:
            self.students = self.DEFAULT_STUDENTS

    def plants(self, student_name: str) -> list[str]:
        if student_name not in self.students:
            raise NoSuchStudentException(f"Učeň {student_name} neexistuje v tomto záhone.")
        
        student_index = self.students.index(student_name)
        
        start_col = student_index * 2
        
        top_plants = self.rows[0][start_col:start_col + 2]
        bottom_plants = self.rows[1][start_col:start_col + 2]
        
        raw_chars = list(top_plants + bottom_plants)
        
        result = [self.PLANT_MAP[char] for char in raw_chars]
        
        return result