row	col	operator	diff
1	1	f	3.5
1	2	b	4.2
1	3	a	6.7
1	4	d	6.6
1	5	c	4.1
1	6	e	3.8
2	1	b	8.9
2	2	f	1.9
2	3	d	5.8
2	4	a	4.5
2	5	e	2.4
2	6	c	5.8
3	1	c	9.6
3	2	e	3.7
3	3	f	-2.7
3	4	b	3.7
3	5	d	6
3	6	a	7
4	1	d	10.5
4	2	c	10.2
4	3	b	4.6
4	4	e	3.7
4	5	a	5.1
4	6	f	3.8
5	1	e	3.1
5	2	a	7.2
5	3	c	4
5	4	f	-3.3
5	5	b	3.5
5	6	d	5
6	1	a	5.9
6	2	d	7.6
6	3	e	-0.7
6	4	c	3
6	5	f	4
6	6	b	8.6
