Hey @Badr4sudan
J 
Q strict phonetics would be F/V (Jack in first position) - R (Queen) - S/Z (Spade-Spade).
The structure for Picture/Picture pairs is “Value1 - Value2 - Suit Combination.” (With exception for xK pairs.)
The structure for Picture/Number pairs is “Value1 - Suit Combo - Value2.”
The structure for Number/Picture pairs involves alternate suit blend phonetics that give you SW, ST, SN, SM, SL, STR, SK, and SP sounds for the suits.
I highly recommend checking out the doc I link to below for a deeper explanation and examples of this.
Many of us that use Shadow will use words or phrases that contain extra trailing consonant sounds that don’t encode anything. This is why “FoReSt” could still work for that pair. The first three consonant sounds provide the encoding. Anything extra is ignored. Its is VERY VERY difficult to find true 3 consonant only words that fit all the images required in Shadow and also provide a good unique visual. One of the simplest exceptions is to allow extra consonants like this and only encode via the first 3 sounds.
I have RaMMStein as my image for Q 10 
. When I see that card pair I read it as R-M-S and through practice I automatically visualize the singer of the band Rammstein. The “tein” at the end never even comes into mind, I’ve learned to trigger the visual just by reading RMS.
If you want some more insight and clarity on Shadow, check out this thread link below. There’s a document there with detailed instructions for every sound and phonetic structure of every pair type. (I’d recommend opening the file via google sheets. The copy/paste into the forum format was a little clunky and the doc is up to date.)