Bash script last 4 folder delete

[Gokan Atmaca <linux.gokan@gmail.com>]

Hello

I have directories created at different times. This last updated
directory is in the directory with a symbolic link named "last".
Directories are named from 100 to 110. what i want is to delete all
directories except the folder named "last" and 4 before it. How can I
do that?

Exampe_folder_list:
100
101
102
103
104
105
106
107
108
109
110
last -> /root/test1/110


How can I do that?

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