Brightness of Brain Contest
Problem J
Time limit: 1 second Memory: 16 MB

Meta Editor

The Problem

    You got a job as a programmer in the ACM (A Cool Meta-editor) company, which has has been serving as a producer of one of the coolest text editor of the world. In the update process of the text editor program of that company you are assigned a job to make a program unit which will grammatically correct a line of text. Your job is very simple, take a line of text as input and produce a line of output without the words repeated.

The Input

    Contains several lines of text. Each line contains several English words having no more then 50 characters each. A word may be defined as a portion of a string separated by one or more spaces or tabs. There will be no blank line in the input. A line may contain at most 20,000 characters. Input is terminated by EOF.

The Output

    Produce a line of text for each line of input, after removing any repeated pattern. The words must be separated by only one space.

Sample Input

test string test string test string
repeat repeat

Sample Output

test string
repeat

Suman Mahbub
Created: 03-12-2002
Updated: 14-12-2002, 26-01-2003
Idea: mAruf Hasan