79590
He followed this idea by creating ( with Stanislaw Ulam ) a purely logic-based automaton , not requiring a physical body but based on the changing states of the cells in an infinite grid – the first cellular automaton .
 Stanislaw Ulam
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Text: {0} 
Answer:
 Stanislaw Ulam