Look at the clock near the bed as the time is the password. For example, if the clock shows the 5h:6m, you would enter 0 5 0 6. The solution is 0 7 1 9, under the normal action and normal riddle difficulty settings.
Note: The clock should be read in military time. For example, if the alarm clock reads as 2:14 then it should be entered as 14:14 on the suitcase.