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  1.  
  2. (setq x '(a b c))
  3. (setq y 'z)
  4.  
  5. (print `(y . ,@x))
Runtime error #stdin #stdout #stderr 0.02s 10052KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
*** - READ: the syntax `( ... . ,@form) is invalid