This is what I have right now, but I need help correcting some errors.

#!/bin/bash

for P in `echo $* | sed -e 's/^:/.:/' -e 's/::/:.:/' -e 's/:$/:./' -e

's/:/ /g'`

do

case $NP in

"")

NP="$P"

;;

$P|$P:*|*:$P:*|*:$P)

continue

;;

*)

NP="$NP:$P"

;;esac

done

echo $NP

ERRORS: Missing 2 cases, a : and a :

Help with running program in terminal

Write a shell script to concatenate lists together, and output the resulting list. Do not include any argument that is a sub-list of the entire list. (The script will clean the list of any redundant items.) You must preserve the original order of the list. Remember to account for the following situations: - a : at the beginning of the list is the same as a . at the beginning of the "list" - a :: anywhere in the list is the same as :.: - a : at the end of the list is the same a :. /bin: is the same as /bin:. Project using temporary files will not be graded. The input to the script will be colon or space separated lists and the output will be a colon separated list with the original order preserved and all redundant items removed. USAGE: clean_list list .... Where list a a colon or whitespace separated list. Examples: prompt> clean_list a a:b a:b:c :x: y:z a:b:c::x:y:z prompt>clean_1ist/bin:/usr/bin:/usr/openwin/bin /usr/bin:/usr/etc:/etc: /usr/bin/x11 .:/bin /bin:/usr/bin:/usr/openwin/bin:/usr/etc:/etc: .:/usr/bin/X11 prompt>clean_list apple:orange:apple pear orange peach apple: orange:pear:peach REMEMBER TO HANDLE THE SPECIAL CASES OF LEADING:, A ::, AND A TRAILING