<Multi_key> <equal> <equal> : "≡" U2261 # IDENTICAL TO
<Multi_key> <colon> <equal> : "≔" U2254 # COLON EQUALS
<Multi_key> <equal> <colon> : "≕" U2255 # EQUALS COLON
<Multi_key> <equal> <equal> : "≡" U2261 # IDENTICAL TO
<Multi_key> <colon> <equal> : "≔" U2254 # COLON EQUALS
<Multi_key> <equal> <colon> : "≕" U2255 # EQUALS COLON