To write the Greek Small Letter Omega with Psili and Perispomeni and Ypogegrammeni symbol ᾦ on keyboard using ALT codes; ALT+8102, just hold down the ALT key while typing the alt key code 8102. 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.
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