# Adjacent at bottom (0.0.0.0 + 0.0.0.1 merge to /31):
0.0.0.0/31
# Adjacent at top (255.255.255.254 + 255.255.255.255 merge to /31):
255.255.255.254/31
# Four at bottom merge to /30:
0.0.0.0/30
# Four at top merge to /30:
255.255.255.252/30
# Exclude top from full range:
255.255.255.248/30
255.255.255.252/31
255.255.255.254
# Exclude bottom from full range:
0.0.0.1
0.0.0.2/31
0.0.0.4/30
# Common of {0,max} and {max}:
255.255.255.255
# Diff of {0} vs {max}:
0.0.0.0
255.255.255.255
# Count adjacent merge at top:
1,2
