Remove Duplicates

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Level EASY

Given a string S, remove consecutive duplicates from it recursively.

Input Format :
String S
Output Format :
Output string
Constraints :
1 <= |S| <= 10^3
where |S| represents the length of string
Sample Input 1 :
aabccba
Sample Output 1 :
abcba
Sample Input 2 :
xxxyyyzwwzzz
Sample Output 2 :
xyzwz

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