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Problems

The card and envelope

The card and envelope

Given the dimensions of rectangular cards and envelopes. Required to determine whether to put a postcard in the envelope.

Input

In the first row are the size of cards, the second - the size of the envelope. Dimensions cards and envelopes - are positive integers not exceeding100.

Output

If the card can be embedded in an envelope, print "Possible", if no - show "Impossible".

Time limit 1 second
Memory limit 64 MiB
Input example #1
1 10
9 9
Output example #1
Possible