Quiz : Twice counter
CK CK 3788 
Created at  
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Given an array of 10 words. Some words are repeated twice, we need count such words.

Output:
Print the count of the words which are repeated twice in the string.

Constraints:
1<=no of words<=10^5
1<=length of each word<=10^5

Example Input 1)
hate love peace love peace hate love peace love peace

Example Input 2)
Tom Jerry Thomas Tom Jerry Courage Tom Courage Jane Tom

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