def pin_extractor(poems):
results = \[\]
for poem in poems:
secret_code = ''
lines = poem.split('\\n')
for line_index, line in enumerate(lines):
words = line.split()
if line_index < len(words):
secret_code += str(len(words\[line_index\]))
else:
secret_code += '0'
results.append(secret_code)
return results