Need Help on Nifi replace text with regex

[Puspak]

Hi Team ,

I am relatively new to Nifi regex .

i have a requirement like i have a flow file content as below .

XXXXXXXX<FLIGHT-IN>
                <FLIGHT>KH228</FLIGHT>
                <DATE>20JUN19</DATE>
                </FLIGHT-IN>YYYYYYYYY

And the expected out put is 
<FLIGHT-IN>
          <FLIGHT>KH228</FLIGHT>
          <DATE>20JUN19</DATE>
</FLIGHT-IN>

i know we can achieve the same  with replace text and nifi expression
language but not sure how .

Quick help is highly appriciated. 



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