To write the Greek Small Letter Eta with Psili and Perispomeni and Ypogegrammeni symbol ᾖ on keyboard using ALT codes; ALT+8086, just hold down the ALT key while typing the alt key code 8086. You have to use the numeric keypad of your key🀅board. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.