from typing import List

DEFAULT_STUDENTS = ['Alice', 'Bob', 'Charlie', 'David',
                    'Eve', 'Fred', 'Ginny', 'Harriet',
                    'Ileana', 'Joseph', 'Kincaid', 'Larry']

PLANT_NAMES = {'V': 'Violets', 'R': 'Radishes', 'G': 'Grass', 'C': 'Clover'}


class Garden:

    def __init__(self, diagram: str, students: List[str] = DEFAULT_STUDENTS):
        diagram = diagram.split()
        self.plant_db = {}

        for i, name in enumerate(sorted(students)):
            self.plant_db[name] = ''.join([diagram[0][2*i:2*i + 2],
                                           diagram[1][2*i:2*i + 2]])

    def plants(self, name: str) -> List[str]:

        if name not in self.plant_db.keys():
            return []

        return [PLANT_NAMES[ch] for ch in self.plant_db[name]]