当第二行中的第一个字段与前一行匹配时打印行

import re

def print_matching_lines(text):
    lines = text.split('\n')
    for i in range(1, len(lines)):
        if re.match(r'^(\w+)', lines[i]) and re.match(r'^(\w+)', lines[i-1]):
            print(lines[i])

# 示例文本
text = '''
apple
banana
carrot
dog
elephant
fish
grape
horse
'''

print_matching_lines(text)

elephant
horse