Every door of a nine-story building (#floor between [1,9]) has a locker working with a combination of 5 digits. Every room of the building has a number of 4 digits allocated, and the first digit represents the floor (i.e. 2XXX is on floor #2).
Two valid combinations are known to you:
Room #1304 --> 08403
Room #2320 --> 70232
Find the pattern between the number of the room and its combination in order to know every room's combination in that building.