How to get a property value of an object which is located randomly

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孤城傲影
孤城傲影 2021-01-01 18:15
res = {
  A: { device001: 1, device002: 2 },
  B: { device003: 3, device004: 4 }
};

For the above object in Javascript, I need to get the value of d

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