"Canonical" encoding but with the least significant digit of the output shifted by +1. This means that e.g Gold = 5 in the first digit and 0 in the second digit.

 0.	salt-salt-salt-salt-salt	 => 	Lead-Gold
 1.	salt-salt-salt-salt-FIRE	 => 	Lead-Lead
 2.	salt-salt-salt-FIRE-salt	 => 	Lead-Tin
 3.	salt-salt-salt-FIRE-FIRE	 => 	Lead-Iron
 4.	salt-salt-FIRE-salt-salt	 => 	Lead-Copper
 5.	salt-salt-FIRE-salt-FIRE	 => 	Lead-Silver
 6.	salt-salt-FIRE-FIRE-salt	 => 	Tin-Gold
 7.	salt-salt-FIRE-FIRE-FIRE	 => 	Tin-Lead
 8.	salt-FIRE-salt-salt-salt	 => 	Tin-Tin
 9.	salt-FIRE-salt-salt-FIRE	 => 	Tin-Iron
10.	salt-FIRE-salt-FIRE-salt	 => 	Tin-Copper
11.	salt-FIRE-salt-FIRE-FIRE	 => 	Tin-Silver
12.	salt-FIRE-FIRE-salt-salt	 => 	Iron-Gold
13.	salt-FIRE-FIRE-salt-FIRE	 => 	Iron-Lead
14.	salt-FIRE-FIRE-FIRE-salt	 => 	Iron-Tin
15.	salt-FIRE-FIRE-FIRE-FIRE	 => 	Iron-Iron
16.	FIRE-salt-salt-salt-salt	 => 	Iron-Copper
17.	FIRE-salt-salt-salt-FIRE	 => 	Iron-Silver
18.	FIRE-salt-salt-FIRE-salt	 => 	Copper-Gold
19.	FIRE-salt-salt-FIRE-FIRE	 => 	Copper-Lead
20.	FIRE-salt-FIRE-salt-salt	 => 	Copper-Tin
21.	FIRE-salt-FIRE-salt-FIRE	 => 	Copper-Iron
22.	FIRE-salt-FIRE-FIRE-salt	 => 	Copper-Copper
23.	FIRE-salt-FIRE-FIRE-FIRE	 => 	Copper-Silver
24.	FIRE-FIRE-salt-salt-salt	 => 	Silver-Gold
25.	FIRE-FIRE-salt-salt-FIRE	 => 	Silver-Lead
26.	FIRE-FIRE-salt-FIRE-salt	 => 	Silver-Tin
27.	FIRE-FIRE-salt-FIRE-FIRE	 => 	Silver-Iron
28.	FIRE-FIRE-FIRE-salt-salt	 => 	Silver-Copper
29.	FIRE-FIRE-FIRE-salt-FIRE	 => 	Silver-Silver
30.	FIRE-FIRE-FIRE-FIRE-salt	 => 	Gold-Gold
31.	FIRE-FIRE-FIRE-FIRE-FIRE	 => 	Gold-Lead