"fish -c 'ss 0'"
    m:0x0 + c:191
    XF86Tools


"fish -c 'math (cat /sys/class/backlight/backlight/brightness)-2000 > /sys/class/backlight/backlight/brightness'"
    m:0x40 + c:72
    Mod4 + F6


"fish -c 'math (cat /sys/class/backlight/backlight/brightness)+2000 > /sys/class/backlight/backlight/brightness'"
    m:0x40 + c:73
    Mod4 + F7