BCD to 7-Segment Decoder

OBJECTIVE: Identify BCD inputs A,B,C,D (which correspond to numbers 1,2,4,8 randomly).

ABOUT: BCD input consists of A, B, C and D which are accidentally jumbled during the design phase.
States of A, B, C and D can be used by clicking on them and the corresponding 7-Segment display is shown.
Unfortunately, the hardware of logic gates is not visible from outside.

STEP: Use the states to identify the BCD inputs within 7 chances (a chance is change of the State).
(In case you take fewer chances to identify the states then click "Gothcha!" to enter your answer.)

NOTE: This faulty 7-Segment decoder
------will work only for more than one active inputs &
------can display only the Single digited numbers (<=9).