count position of a specific character

[tansh0099]

Hi everyone,

I am struggling to get multiple position of "X" in a string 
this is a type of unique key wherein I in want to show the positions of only "X" from this string 

Key	Positions
FGENDPEXDTX	7,10
FGXXXXPXGNT	2,3,4,5,7

can you guys help me out with this please?

[tansh0099]

thank you so much you guys   :)
both the workflow worked for me
you guys are awesome.....Thanks once again