Original Square Matrix

	X1	X7	X12	X15	X22	X26	X31	X34	X39	X44	X51
X1	1	2	3	4	5	6	7	8	9	10	11
X7	11	9	7	5	3	1	10	8	6	4	2
X12	3	4	7	8	5	7	2	9	1	3	2
X15	9	9	8	4	7	1	1	3	2	5	3
X22	6	7	7	4	4	2	9	8	8	1	1
X26	3	9	4	8	5	7	6	1	2	3	8
X31	1	2	1	3	1	4	1	5	1	6	1
X34	6	7	8	5	2	9	5	1	6	8	9
X39	4	8	7	4	6	5	1	9	2	7	5
X44	2	2	2	8	6	7	9	5	3	7	7
X51	9	9	9	6	6	4	8	7	2	1	3



Final Square Submatrix

	X1	X12	X22	X31
X1	1	3	5	7
X12	3	7	5	2
X22	6	7	4	9
X31	1	1	1	1