#include <bits/stdc++.h>
 
#define _ ios::sync_with_stdio(0); cin.tie(0);
#define ll long long
#define pb(x) push_back(x)
#define endl "\n"
#define output freopen("/home/satoshi-black/Documents/CPP I_O/output.txt","w", stdout)
#define input freopen("/home/satoshi-black/Documents/CPP I_O/input.txt","r", stdin)
 
using namespace std;
 
int main()
{_
	//output;input;
	
	int n;
	cin>>n;
	int st_x,st_y,en_x,en_y;
	cin>>st_y>>st_x>>en_y>>en_x;
	if(abs(st_y-en_y)%2!=0)
		cout<<"Impossible\n";
	else
		cout<<"Possible\n";
	return 0;
} 
/*

Possible
H odd
V even


Impossible
H even
V odd


Possiblre
H even(0)
V even


V odd isn'tpossible

*/