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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import re
print re.search('[ef]+', 'abcdefg').span()
print re.search('[ef]*', 'abcdefg').span()
for i in re.finditer('[ef]*', 'abcdefg'):
print i.span()
for i in re.finditer('[ef]+', 'abcdefg'):
print i.span()
import re
print re.search('d[ef]+', 'adbcdefg').span()
print re.search('d[ef]*', 'adbcdefg').span()
import re
print re.search('d[ef]+', 'abcdefg').span()
print re.search('d[ef]*', 'abcdefg').span()