year_list = [2017,2018,2019,2020,2021]
print(year_list)
print(year_list[4])

food = ["米","パン","うどん"]
print(food)
food.append("パスタ")
print(food)

human = {"masaya":"20","nichika":"19","masaki":"17"}
print(human)
print(human["masaya"])