B - F collisions

B gliders can approach an F glider from four alignments.

1${}^{st}$	BBar + F
2${}^{nd}$	D + A dimer
3${}^{rd}$	B + F
4${}^{th}$	BBar + F

There are four relative alignments between B and F gliders, two of which exchange the gliders for a BBar5 and an F, one of which is solitonic, and one of which leaves a residue travelling to the right.

Figure 3.27: Left: The four B - F collisions.