MATLAB: How to index nth item to appear within nested struct

Question

Is there a way that I can pull out the 'x470A' and 'x405A' from within this struct to create string variables with these names (assuming I hypothetically don't know the names, but want the first and second items under data.streams?)

Essentially I would like to create two new variables, x = 'x470A' and y = 'x405A' and would like to automate it rather than having to print this every time. Thank you in advance!

>> data.streams
ans = 
  struct with fields:
    x470A: [1×1 struct]
    x405A: [1×1 struct]
     Fi1r: [1×1 struct]
>> 

Answer 1

fields = fieldnames(data.streams);%will contain all the fieldnames in a cell array.
x=fields{1};
y=fields{2};