Disk Defragmentation Activity

The diagram below represents a fragmented hard disk.

Each coloured block is a fragment of a file. The grey blocks are unused blocks on the hard disk.

Drag the file blocks to create contiguous files. It does not matter which order your files are in, but each file's fragments must be in the correct order. There must not be any gaps between files.

AFile A (20)
BFile B (15)
CFile C (13)
DFile D (23)
EFile E (9)
Unused block
C1
A1
D1
A2
E1
D2
B1
D3
D4
D5
B2
A3
A4
A5
D6
C2
B3
D7
D8
D9
C3
A6
A7
B4
B5
B6
D10
C4
D11
B7
E2
A8
B8
A9
A10
E3
E4
B9
D12
E5
B10
D13
A11
A12
C5
A13
E6
C6
C7
B11
D14
E7
C8
C9
A14
C10
C11
D15
C12
D16
D17
D18
B12
E8
A15
A16
D19
C13
D20
A17
B13
A18
B14
A19
B15
D21
E9
D22
D23
A20