在下面的文本中找到5个以“P”开头的单词，并将它们按字母顺序排序。


“Penguins are a group of aquatic flightless birds. They live almost exclusively in the Southern Hemisphere, with only one species, the Galapagos penguin.”
1. penguins
2. group
3. exclusively 
4. penguin
5. species

按字母顺序排序： 
1. exclusively  
2. group 
3. penguin 
4. penguins 
5. species