type(obj) = <class 'sage.combinat.words.word.InfiniteWord_callable'>
version = 4.6.1
obj =
'word: 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,...'
