Search for 𝒕 ¯ 𝒕 𝑯 / 𝑨 → 𝒕 ¯ 𝒕 𝒕 ¯ 𝒕 production in the multilepton final state in proton–proton collisions at √ 𝒔 = 13 TeV with the ATLAS detector The