DIRPATH="/var/www/nextcloud/data/grayhook/files/Torrents/Kimetsu.no.Yaiba.Katanakaji.no.Sato.hen.WEB-DL.1080p"
PRENAME="[SubsPlease] Kimetsu no Yaiba - Katanakaji no Sato-hen - "
POSTNAME=" [1080p]"
SOUNDDIR="RUS Sound/StudioBand"
for x in {0..11}; do
    ffmpeg_add_audio_into_video "$DIRPATH/$PRENAME`printf "%02d" $x`$POSTNAME.mkv" \
                      "$DIRPATH/$SOUNDDIR/$PRENAME`printf "%02d" $x`$POSTNAME.mka";
done