import re
word = 'de2'
pattern = re.compile(r'[a-z]*[1-4]')
m = pattern.match(word)
result = ''
if m:
result = word
else:
result = word + '0'
print(result)
import re
word = 'de2'
pattern = re.compile(r'[a-z]*[1-4]')
m = pattern.match(word)
result = ''
if m:
result = word
else:
result = word + '0'
print(result)