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Hello Perl Monks!
This is what I need to do. I have a text file that contains a column of entries like this:


test.txt

K-2-D-10A
K-2-D-10C
K-2-D-10D
K-2-D-10E
K-2-D-10F
K-2-D-10G
K-2-D-11A
K-2-D-11B

K-2-D-12I
K-2-D-12J

K-2-D-12A
K-2-D-12B
K-2-D-12C
K-2-D-12D
K-2-D-12E
K-2-D-12F
K-2-D-12G
K-2-D-12H
K-2-D-13B
K-2-D-13C

K-2-D-14E
K-2-D-14I

K-2-D-14A
K-2-D-14B
K-2-D-14C
K-2-D-14D
K-2-D-14F
K-2-D-14G
K-2-D-14H
K-2-D-14J
K-2-D-14K

K-2-D-15E

K-2-D-15A
K-2-D-15B
K-2-D-15D
K-2-D-16A
K-2-D-16B
K-2-D-16D
K-2-D-16E
K-2-D-17A
K-2-D-17B
K-2-D-17C
K-2-D-17D
K-2-D-17E
K-2-D-17F
K-2-D-17G
K-2-D-17K

K-2-D-18C

K-2-D-18A
K-2-D-19A
K-2-D-19B

K-2-D-1A
K-2-D-1B
K-2-D-1D

K-2-D-2J
K-2-D-2I

K-2-D-20A
K-2-D-20B

K-2-D-21I
K-2-D-21Q
K-2-D-21H
K-2-D-21O
K-2-D-21P

K-2-D-21A
K-2-D-21B
K-2-D-21C
K-2-D-21E
K-2-D-21F
K-2-D-21G
K-2-D-21J
K-2-D-21K
K-2-D-21L
K-2-D-21M
K-2-D-21N
K-2-D-21R
K-2-D-22A
K-2-D-22B
K-2-D-22C
K-2-D-22D
K-2-D-22E
K-2-D-22F
K-2-D-22G
K-2-D-22H

K-2-D-2F
K-2-D-2G
K-2-D-2H
K-2-D-3A
K-2-D-3B
K-2-D-3C
K-2-D-3D
K-2-D-3E
K-2-D-3F
K-2-D-4A
K-2-D-4B
K-2-D-5F
K-2-D-5A
K-2-D-5B
K-2-D-5C
K-2-D-5E
K-2-D-6D
K-2-D-6A
K-2-D-6E
K-2-D-7A
K-2-D-7B
K-2-D-7C
K-2-D-8A
K-2-D-8B
K-2-D-8C
K-2-D-8D
K-2-D-8E
K-2-D-9A
K-2-D-9B
K-2-D-9C
K-2-D-9D
K-2-D-9E

K-2-D-10B
K-2-D-16C
K-2-D-1C
K-2-D-5D
K-2-D-6B
K-2-D-6C
K-2-D-7D
K-2-D-7E
[download]

This is what my output file needs to look like after sorting:

output.txt

K-2-D-1A
K-2-D-1B

K-2-D-1C

K-2-D-1D

K-2-D-2F
K-2-D-2G
K-2-D-2H

K-2-D-2I
K-2-D-2J

K-2-D-3A
K-2-D-3B
K-2-D-3C
K-2-D-3D
K-2-D-3E
K-2-D-3F

K-2-D-4A
K-2-D-4B
K-2-D-5A
K-2-D-5B
K-2-D-5C

K-2-D-5D

K-2-D-5E
K-2-D-5F
K-2-D-6A

K-2-D-6B
K-2-D-6C

K-2-D-6D
K-2-D-6E
K-2-D-7A
K-2-D-7B
K-2-D-7C

K-2-D-7D
K-2-D-7E

K-2-D-8A
K-2-D-8B
K-2-D-8C
K-2-D-8D
K-2-D-8E
K-2-D-9A
K-2-D-9B
K-2-D-9C
K-2-D-9D
K-2-D-9E

K-2-D-10A


K-2-D-10B

K-2-D-10C
K-2-D-10D
K-2-D-10E
K-2-D-10F
K-2-D-10G
K-2-D-11A
K-2-D-11B
K-2-D-12A
K-2-D-12B
K-2-D-12C
K-2-D-12D
K-2-D-12E
K-2-D-12F
K-2-D-12G
K-2-D-12H

K-2-D-12I
K-2-D-12J

K-2-D-13B
K-2-D-13C
K-2-D-14A
K-2-D-14B
K-2-D-14C
K-2-D-14D

K-2-D-14E

K-2-D-14F
K-2-D-14G
K-2-D-14H

K-2-D-14I

K-2-D-14J
K-2-D-14K


K-2-D-15A
K-2-D-15B
K-2-D-15D

K-2-D-15E

K-2-D-16A
K-2-D-16B

K-2-D16-C

K-2-D-16D
K-2-D-16E
K-2-D-17A
K-2-D-17B
K-2-D-17C
K-2-D-17D
K-2-D-17E
K-2-D-17F
K-2-D-17G
K-2-D-17K
K-2-D-18A

K-2-D-18C

K-2-D-19A
K-2-D-19B

K-2-D-20A
K-2-D-20B
K-2-D-21A
K-2-D-21B
K-2-D-21C
K-2-D-21E
K-2-D-21F
K-2-D-21G

K-2-D-21H
K-2-D-21I

K-2-D-21J
K-2-D-21K
K-2-D-21L
K-2-D-21M
K-2-D-21N

K-2-D-21O
K-2-D-21P
K-2-D-21Q

K-2-D-21R
K-2-D-22A
K-2-D-22B
K-2-D-22C
K-2-D-22D
K-2-D-22E
K-2-D-22F
K-2-D-22G
K-2-D-22H
[download]

I've put spaces before and after the entries that need to be sorted/are sorted.
Any help would be appreciated.Thanks,

perl_seeker:)

Readmore tags added by GrandFather

In reply to Sorting question by perl_seeker

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