day	hardness
1	16.3
1	15.3
1	16.4
1	15.6
1	15.9
2	16.5
2	16.3
2	16.8
2	15.8
2	15.5
3	16.4
3	15.9
3	16.7
3	15.7
3	15.7
4	16.3
4	16.3
4	15.8
4	16.5
4	15.9
5	15.5
5	15.6
5	16.4
5	15.8
5	15.3
6	15.5
6	15.5
6	16.2
6	15.5
6	16.5
7	15.5
7	15.2
7	15.8
7	16.2
7	15.9
8	15.5
8	15.2
8	15.7
8	15.7
8	15.8
9	16.1
9	15.8
9	15.6
9	15.6
9	16
10	15.3
10	15.4
10	16.2
10	15.9
10	15.7
11	16.1
11	15.3
11	15.7
11	15.8
11	15.7
12	15.9
12	14.9
12	15.9
12	15.5
12	15.5
13	16.2
13	15.9
13	15.6
13	15.3
13	16
14	15.8
14	15.8
14	15.4
14	15.9
14	15.2
15	16
15	16.4
15	15.9
15	15.8
15	15.9
16	16
16	14.6
16	16.2
16	16
16	15.8
17	15.9
17	15.9
17	16
17	15.6
17	16
18	15.3
18	15.8
18	16.3
18	15.8
18	15.2
19	15.7
19	15.6
19	15.6
19	16.2
19	15.7
20	15.1
20	15.3
20	14.9
20	15.4
20	15.5
21	15.2
21	15.6
21	14.8
21	14.9
21	15.7
22	14.8
22	15.7
22	14.9
22	15.6
22	15
23	15.4
23	15.2
23	14.7
23	14.8
23	15
24	14.9
24	15.2
24	14.8
24	15.7
24	15.1
25	15
25	15.2
25	15.3
25	15.6
25	16
26	14.8
26	14.9
26	15
26	14.4
26	14.8
27	15.1
27	15.2
27	15.5
27	14.8
27	14.3
28	15.7
28	15.3
28	15.1
28	15.6
28	15.5
29	15.5
29	15.6
29	14.6
29	14.7
29	15
30	14.6
30	15.1
30	14.8
30	15.2
30	14.2