start floor	10:00 AM	start floor 	12:00 PM	start floor	2:00 PM	start floor 	4:00 PM
1	2	6	7	2	3	6	3
4	6	6	3	2	5	5	3
1	2	6	1	4	2	6	1
5	1	6	4	2	4	8	3
1	3	5	2	*	*	6	2
4	5	6	1	2	1	6	2
5	3	5	6	5	4	8	3
5	2	6	5	5	1	6	2
5	2	6	3	2	2	6	2
*	*	5	5	2	3	5	1