To write the 0b425b3ff400029266a004000730061006400200073006f006e0067 Sad Symbol Smiley Face symbol on keyboard using ALT codes; ALT+1.0784719749777E+69, just hold down the ALT key while typing the alt key code 1.0784719749777E+69. 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.