LIONS
- if 2 then LI are the first two letters; not O from TROUT - 0, not N from BUNNY - 0 and not S from GOATS - 0.
- if 1 then I is the second letter. Must be L or I from the same reasoning as above. also KITTY - 1 shows one of KI is correct as not T from OTTER - 0, not T from GOATS - 0, and not Y from BUNNY - 0. Assuming the K is correct then the I is wrong but we've already established either the L or I must be right from LIONS - 1 and it cannot be the L if the K is right; therefore I must be the second letter.
- if 0 then K is the first letter since KITTY - 1 and not the I from LIONS - 0, not the T from OTTER - 0, not the T from GOATS - 0, and not the Y from BUNNY - 0.