Change-hr	group
28	caffeine
11	caffeine
-3	caffeine
14	caffeine
-2	caffeine
-4	caffeine
18	caffeine
2	caffeine
2	caffeine
26	decaf
1	decaf
0	decaf
-4	decaf
-4	decaf
14	decaf
16	decaf
8	decaf
0	decaf
18	decaf
-10	decaf