How to update a multi-level json document?

Below is the JSON I am working on. Is there a way I could update a specific section of the document?

In the document below, how can I update “D”:“3” to “D”:“33” and “E”:“4” to “E”:“44”?

Can this be done by the means of a single command or each key-value pair needs it’s own command?

Thank you!

{
“_id”: ObjectId(“5c10e84b11a1d5e18ad60e6d”),
“name”: “xyz”,
“aa”: [{
“A”: “1”,
“B”: “2”,
“C”: [{
“D”: “3”,
“E”: “4”
},
{
“F”: “5”,
“G”: “6”
}
]
}]
}