353068
However , for special arrangements of the given circles , the number of solutions may also be any integer from 0 ( no solutions ) to six ; there is no arrangement for which there are seven solutions to Apollonius ' problem .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None