import os

d = r'.scratch\opportunity-bugfix\lanhu-pages'
names = sorted(f for f in os.listdir(d) if f.startswith('A7-3'))
out = r'.scratch\a7-parity\a73-files.txt'
with open(out, 'w', encoding='utf-8') as fh:
    fh.write('\n'.join(names))
print('OK', len(names))