"LOCATION"	"DAY"	"X1"	"X2"	"D"
1	1	4	3	1
1	2	8	6	2
1	3	12	16	-4
1	4	1	1	0
1	5	7	6	1
1	6	11	8	3
1	7	14	10	4
1	8	10	12	-2
1	9	2	2	0
1	10	15	20	-5
2	1	6	5	1
2	2	3	1	2
2	3	1	2	-1
2	4	10	12	-2
2	5	17	17	0
2	6	4	7	-3
2	7	8	6	2
2	8	12	12	0
2	9	10	9	1
2	10	20	19	1