23400
Even a simple bundle of bamboo or reeds , tied or put in an old tin can and hung in a warm place , is very suitable for solitary bees .
 bamboo, reeds
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 bamboo, reeds