18478
Initially Operated as an operational training squadron ( OTU ) , flying P-39 Aircobras and P-43 Lancers with a mission to train newly graduated pilots from Training Command in single-engine fighter aircraft .
 Command
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Command