Find the outsider that is hidden in a list where one word is repeated over and over.

Input

A list of $$n$$ words ($$n \geq 0$$) — each on a separate line — ending with a line that only contains the word stop. Of all $$n$$ words, at least one is different from the others.

Output

If all words are equal, the text there is no outsider should appear. Otherwise, the text the outsider is "word" should appear. The word in italics is the word that is different from the rest. If the list consists of 2 different words, it is impossible to determine which of both is wrong. In this case, the text outsider can't be determined should appear.

Example

Input:

Libya
Libya
stop

Output:

there is no outsider

Example

Input:

Paraguay
Egypt
Paraguay
Paraguay
Paraguay
Paraguay
Paraguay
Paraguay
Paraguay
Paraguay
Paraguay
Paraguay
stop

Output:

the outsider is "Egypt"