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2017 ACM ICPC South Central USA Regional Programming Contest

G - No Duplicates

There is a game in which you try not to repeat a word while your opponent tries to see if you have repeated one.

"THE RAIN IN SPAIN" has no repeats. "IN THE RAIN AND THE SNOW" repeats THE. "THE RAIN IN SPAIN IN THE PLAIN" repeats THE and IN.

Write a program to test a phrase.

Input

The first line indicates the number of test cases. Each line of input is a line containing words separated by single spaces, where a word consists of one or more uppercase letters. A line contains no more than 80 characters.

Output

On a separate line for each case, output "yes" if no word is repeated, and "no" if one or more words repeat.

Sample Input

3
THE RAIN IN SPAIN
IN THE RAIN AND THE SNOW
THE RAIN IN SPAIN IN THE PLAIN

Sample Output

yes
no
no