how to limit atadenoise to a srgb threshold 0-25(smoothstep)35

[geextahslex]

Hi, I would like to know how to limit the effect of lavfi atadenoise to a specific srgb threshold?
this would be the ffmpeg command

-vf "split [original][denoised];
[denoised] atadenoise [denoised_out];
[original] lutyuv='u=128:v=128' [gray];
[gray][denoised_out]
blend=all_expr='if(between(A,0,25),B,if(between(A,25,35),B+(35-A)*(B-A)/10,A))'"

when I try to use this command
mpv --lavfi-complex="split[original][denoised];[denoised]atadenoise[denoised_out];[original]lutyuv='u=128:v=128'[gray];[gray][denoised_out]blend=all_expr='if(between(A,0,25),B,if(between(A,25,35),B+(35-A)*(B-A)/10,A))'" "elite.mkv"
there is an error
Pad in0 is not connected to anything.

So how to make this work? ^^'

Thank you :)

[geextahslex]

solved by @Ashyni
Thank you :)

local label_prefix = mp.get_script_name()
local toggle = true

local function on_toggle()
    if toggle then
        mp.commandv("vf", "pre", string.format(
            "@%s:lavfi=[split=3[original][denoise][mask];[mask]lutyuv=y=between(val\\,0\\,150)*1023+between(val\\,151\\,170)*(170-val)*10.23[masked];[denoise]atadenoise=s=5[denoised];[denoised][masked]mergeplanes=0x00010210:yuva420p10le[merged];[original][merged]overlay]",
            label_prefix))
    else
        mp.commandv("vf", "remove", string.format("@%s", label_prefix))
    end
    toggle = not toggle
end

mp.add_key_binding("F2", "toggle_filter", on_toggle)