how can I decode DNS in any udp ports using tshark

[modversion <modversion () gmail com>]

hi list:
  I want to decode all of the udp ports as DNS using tshark , anybody
could be kind enough to tell me how can I make it ?

I've tried -d udp.port=="1-65535",dns and -d udp.port=="1,2,3,4",dns ,
but all falied.

Thank you very much!
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