public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int K = sc . nextInt ( ) ;
  String ans = "IMPOSSIBLE" ;
  int div = sc . nextInt ( ) ;
  int max = div ;
  if ( div == K ) ans = "POSSIBLE" ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    int cur = sc . nextInt ( ) ;
    if ( cur == K ) {
      ans = "POSSIBLE" ;
      break ;
    }
    div = gcd ( div , cur ) ;
    max = Math . max ( max , cur ) ;
  }
  if ( max > K && ( max - K ) % div == 0 ) ans = "POSSIBLE" ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int K = sc . nextInt ( ) ; String ans = " IMPOSSIBLE " ; int div = sc . nextInt ( ) ; int max = div ; if ( div == K ) ans = " POSSIBLE " ; for ( int i = 1 ; i < n ; i ++ ) { int cur = sc . nextInt ( ) ; if ( cur == K ) { ans = " POSSIBLE " ; break ; } div = gcd ( div , cur ) ; max = Math . max ( max , cur ) ; } if ( max > K && ( max - K ) % div == 0 ) ans = " POSSIBLE " ; System . out . println ( ans ) ; }
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