To write the 05c002800b0005f006f0029002f00af Sad Symbol Smiley Face symbol on keyboard using ALT codes; ALT+5.9549891905645E+40, just hold down the ALT key while typing the alt key code 5.9549891905645E+40. 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.