abcdGGGGGGGGGGGefghijklmnopqrstuvwxyz
abcdefgGGGGGGGGGGGhijklmnopqrstuvwxyz

abcdefgGGhijklmnopqrstuvwxyz
abcdefghijklmnoGGpqrstuvwxyz
abcdefghijklmnoGGpqrstuvwxyz

There is a memory block state.
The changes in the memory block be minimal.

abcdGGGGGGGGG
abcdeGGGGGGGG

The memory block is (AllBeginning, AllEnd). 
Within it is (AllBeginning, GapBeginning), (GapBeginning, GapEnd) and (GapEnd, AllEnd).

Operations
==========

A deletion operation of (DeletionBeginning, DeletionEnd) needs to move as little memory blocks around as possible.

intersect:

PreGapPart = (DeletionBeginning, DeletionEnd) i (AllBeginning, GapBeginning).
GapPart = (DeletionBeginning, DeletionEnd) i (GapBeginning, GapEnd).
PostGapPart = (DeletionBeginning, DeletionEnd) i (GapBeginning, GapEnd).

possible fixes:
- move the gap. Will affect (movement-amount) items to the ?? of the gap.
- resize the gap. Will affect (movement-amount) items to the ?? of the gap.
- move the postgap part.