Table:
Year Ended May 31,

Percent Change

(Dollars in millions)	2019	Actual	Constant	2018

Interest expense	$2,082	3%	3%	$2,025

Different merged cells often exist in a table and they can be represented by the JSON {'top-left':(X1, Y1), 'bottom-right':(X2, Y2)}. In this JSON item, '(X1, Y1)' and '(X2, Y2)' are the (row_id, column_id) coordinates for the top-left and bottom-right cells in the merged region, respectively. Please examine the provided table image, identify all merged cells, and return their details using the above-mentioned format. Remember, the numbering for both rows and columns starts at 1.

This table does not contain any merged cells.