START = 0
START_TEACH = 2
START_STUD = 1
NORMAL = 3

TIMETABLE = 4

LOCATION = 5

QUESTION = 6

SETTINGS = 8

CLEAR = 7

WRITE_ANSWER = 9

FOLLOW_MENU = 10

SEARCH_GP = 11
SEARCH_DAY = 12

SEARCH_STAFF = 13
