Table 3.9:
Of the four relative alignments between an EBar and an F, the three highest let the EBar pass. The lowest removes them both leaving only a B to mark their presence.
1st
EBar + F
2nd
EBar + F
3rd
EBar + F
4th
B
Figure 3.21:
Left: EBar collides with F(1). Right: EBar collides with F(2).