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793. Train_3.10
Vaqt limiti: 1 sekund
Xotira limiti: 64 MB

Yura works at a factory that produces heavy machinery. He has a simple job he knocks up wooden boxes of different sizes to pack machinery for delivery to the customers . Each box is a rectangular parallelepiped. Yura uses six rectangular wooden pallets to make a box. Each pallet is used for one side of the box.

Sinus delivers pallets for Yura. Sinus is not very smart and often makes mistakes he brings Yura pallets that do not fit together to make a box. But Sinus does not trust Yura. It always takes a lot of time to explain Sinus that he has made a mis take.
Fortunately, Sinus adores everything related to computers and since rely believes that computers never make mistakes. Yura has decided to use this for his own advantage. Yura asks you to write a program that given sizes of six rectangular pallets tells whether it is possible to make a box out of them.

Input: Input file consists of six lines. Each line describes one pallet and contains two integer numbers w and h(1 ≤ w , h ≤ 10 000) width and height of the pallet in millimeters respectively.

Output: Write a single word POSSIBLE to the output file if it is possible to make a box using six given pallets for its sides. Write a single word IMPOSSIBLE if it is not possible to do so.

Example input

Example output

1

1345 2584

2584 683

2584 1345

683 1345

683 1345

2584 683

POSSIBLE

2

1234 4567

1234 4567

4567 4321

4322 4567

4321 1234

4321 1234

IMPOSSIBLE

Was prepared: Yusupov Giyos

 

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