#include <iostream>
using namespace std;
int gcd(int a,int b){
	if(b==0)return a;
	else return gcd(b,a%b);
}
int main(){
	ios::sync_with_stdio(false);
	int gcda=0,maxa=0;
	int n,r,x;
	cin>>n>>r;
	for(int i=0;i<n;i++){
		cin>>x;
		gcda=gcd(gcda,x);
		maxa=max(maxa,x);
	}
	if(maxa>=r&&r%gcda==0)cout<<"POSSIBLE\n";
	else cout<<"IMPOSSIBLE\n";
	return 0;
}