#include <cstdio>
#define N 100005
int gcd(int a,int b){
	return b?gcd(b,a%b):a;
}
int n,k;
bool ans;
int a[N];
int main(){
	scanf("%d%d",&n,&k);
	for(int i=1;i<=n;++i)
		scanf("%d",&a[i]),ans|=a[i]>=k;
	int g=a[1];
	for(int i=2;i<=n;++i)
		g=gcd(a[i],g);
	ans&=(k%g==0);
	puts(ans?"POSSIBLE":"IMPOSSIBLE");
	return 0;
}
