ELU logic

0.  put 1 atom on the bonder. This is the +1 needed for 2's complement
1.  (Triplex conditional) take least significant digit from A and B, convert (Fire, Salt) into (Atom, No Atom) (reverse for B) using triplex
2.  bond all resulting atoms in a line. There can be 0, 1, 2, 3 atoms
3a. (Grab conditional) if Length >=2, grab with arm 8, discard 1 atom, leave 1 on bonder, if L = 3, there will be an atom on the debonder
3b. (Grab conditional) if Length <=1, grab with arm 10, move the atom to the debonder
3c. the atom on the bonder is the Carry bit, the atom on the debonder is the Sum bit
4.  (Input suppression conditional) grab Sum (which might be Fire/Salt or No Atom), convert it into Fire, place it on the Salt position of Stabilized Fire
5.  (Input suppression conditional) grab whatever is on the Salt position of Stabilized Fire, remove extra Fire if it exists, push into output bonder
6.  repeat 1-5 7 more times
7.  cleanup