About vstack function results of 4,696
27:51 33:29 53:17 64:38 34:03 27:29 44:09 53:13 29:25 29:46 107:08 90:42 60:34 74:00 67:16 62:45 98:45 52:56 27:28 38:01 42:31 31:57 54:45 28:01 71:51 55:14 36:07 40:06 34:50 42:21 76:17 29:20 34:40 30:54 30:08 52:48 51:44 47:19 58:32 56:29 38:13 47:53 32:49 30:25 40:22 34:14