On the Subject of LED Solver

Who knew that LEDs could be so deadly on a bomb?

This needy module has 4 buttons and 4 LEDs.

When the needy activates, find the LEDs that are in the list below and enter the corresponding number.

15:

ON ON
ON ON

41:

ON OFF
ON ON

32:

OFF OFF
ON ON

12:

ON ON
OFF ON

43:

OFF OFF
OFF OFF

22:

OFF OFF
OFF ON

33:

ON OFF
OFF ON