Could someone show me how a problem statement for this is made? and how many inputs/outputs would there be?

weight object 1

weigh object 2

if object 1 is lighter than object 2 otherwise:

keep object 2 tray 1, set aside object 1

weight object 3

weigh object 4

if object 3 is lighter than object 4:

keep object 3 in tray 2, set aside object 4 otherwise:

keep object 4 in tray 2, set aside object 3 if tray 1 object is lighter than tray 2 obkect keep tray 1 object, set aside tray 2 object otherwise: keep tray 2 object, set aside tray one object