To write the 0f8005f00f80029 Sad Symbol Smiley Face symbol on keyboard using ALT codes; ALT+7.3793956915064E+20, just hold down the ALT key while typing the alt key code 7.3793956915064E+20. You have to use the numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.