# 我们希望将患者按照信息，分别按照性别和年龄分成4个组别，分别存储他们的姓名
patient_info = [
    ["Zhang San", 52, "M"],
    ["Li Si", 19, "F"],
    ["Wang Wu", 47, "F"],
    ["Zhao Liu", 29, "M"],
]
group_M_under_30 = []
group_M_over_30 = []
group_F_under_30 = []
group_F_over_30 = []

for patient in patient_info:
    print('new patient:', patient)
    # 补充代码，使用条件判断，将患者分为4组，分别存储他们的姓名即可





# 应当为 ["Zhao Liu"]
print(group_M_under_30)

# 应当为 ["Zhang San"]
print(group_M_over_30)

# 应当为 ["Li Si"]
print(group_F_under_30)

# 应当为 ["Wang Wu"]
print(group_F_over_30)