(let ((n 10) (a 0) (b 1)) (tagbody ODAI-PT13-673 (princ a) (setq n (1- n)) (psetq a b b (+ a b)) (when (> n 0) (princ ", ") (go ODAI-PT13-673)) (terpri)))
Standard input is empty
0, 1, 1, 2, 3, 5, 8, 13, 21, 34
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