#!/usr/bin/env python3

import sys

file1_name = sys.argv[1]
file2_name = sys.argv[2]
file1 = []
file2 = []
with open(file1_name) as f1:
    for line in f1:
        if not line:
            continue
        file1.append(line.strip())
with open(file2_name) as f2:
    for line in f2:
        if not line:
            continue
        file2.append(line.strip())

if len(file1) != len(file2) :
    print(f"Not mirrored: different number of lines: {len(file1)} versus {len(file2)}")
    sys.exit(0)

file2=file2[::-1]

for i in range(len(file1)):
    if file1[i] != file2[i]:
        print(f"Not mirrored: line {i+1} different")
        sys.exit(0)

print("Mirrored")

#!/usr/bin/env python3
import sys

def main():
    # 使用集合 (set) 自动处理去重需求
    male_surnames = set()

    # sys.stdin 允许直接遍历标准输入流，每次迭代读取一行
    for line in sys.stdin:
        # 去除行末尾的换行符和潜在的空白字符
        line = line.strip()
        if not line:
            continue
            
        # 等效于 cut -d'|'
        fields = line.split('|')
        
        # 确保数据格式正确且最后一个字段为 'M' (等效于 grep '|M$')
        if len(fields) == 5 and fields[4] == 'M':
            # 提取姓名列 (0-based index, 第3列索引为2)
            name_field = fields[2]
            
            # 等效于 cut -d',' -f1
            surname = name_field.split(',')[0].strip()
            
            # 存入集合自动去重
            male_surnames.add(surname)

    # sorted() 将无序集合转换为按字母表排序的列表
    for surname in sorted(male_surnames):
        print(surname)

if __name__ == '__main__':
    main()