Initial state at case 3

B = Free block; A = Address of free block; S = Free size
Allocation available bytes:   84 bytes

B  0: A: 0x013BB160, S:    0, next B: 0x013BB520; Start block
B  1: A: 0x013BB520, S:   16, next B: 0x013BB53C
B  2: A: 0x013BB53C, S:   12, next B: 0x013BB560
B  3: A: 0x013BB560, S:   56, next B: 0x013BB598
B  4: A: 0x013BB598, S:    0, next B: 0x00000000; End of region