80203
The undercarriage consisted of a sprung stut carrying two main wheels underneath the engine , with two stabilsing wheels at the wingtips of the lower wing , with a tail slid just aft of the trailing edge of the lower wing .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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