State at case 1a

B = Free block; A = Address of free block; S = Free size
Allocation available bytes:   88 bytes

B  0: A: 0x00CBB160, S:    0, next B: 0x00CBB540; Start block
B  1: A: 0x00CBB540, S:   88, next B: 0x00CBB598
B  2: A: 0x00CBB598, S:    0, next B: 0x00000000; End of region

State at case 1b

B = Free block; A = Address of free block; S = Free size
Allocation available bytes:   80 bytes

B  0: A: 0x00CBB160, S:    0, next B: 0x00CBB548; Start block
B  1: A: 0x00CBB548, S:   80, next B: 0x00CBB598
B  2: A: 0x00CBB598, S:    0, next B: 0x00000000; End of region