@Ankur
In a trie u first insert the first word ..take the second word..If its
not
present in the trie u insert it else remove it from original string:
removing the word requires left shifting the entire string
Alternatively u store the elements in a trie in the initial string and
terminate it with
a)
1. could split the string using a regexp (into an array) in which you
define a "word" -- is "hi." the same as "hi," and "hi" ?
2. then perform a "unique" operation on the array (some languages have
this built in) to remove duplicates
3. recombine array elements into string by joining with
