31200
Rommel 's ( and Guderian 's ) successes and the new possibilities offered by the new tank arm were welcomed by a small number of generals , but worried and paralysed the rest .
 Rommel, Guderian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rommel, Guderian