I think it asks to sort the pieces w.r.t. locations of top-left anchor points of the rectangular regions. (Not the locations of raisins w.r.t. top-left point of the whole cake!)

c#
Really nobody had a problem with Execution Timed Out (12000 ms)? Average Test execution is about 2500 ms, and Attempt is failing...

Also if you have trouble discerning if the particular sequence of 1's is a dot or a dash, assume it's a dot.

No, there isn't.

There are ambiguities in test cases.
For ex: is "111" a 'T' (when time unit = 1) or an 'E' (when time unit = 3)?
Since we dont know what the time unit is, both interpretions are possible.