grep - block with start & end text

[Prashant Thorat]

Hi All,

Can you please help me to grep below 'block of text' from my file ? this
blocks occurs number of time & I want to grep all in between lines of this
block -

first line is having - retr_test asm1
& 4th line is having only - END

so I want to grep all four lines with above match .

Thanks in advance,
Prashant