public static void main ( String [ ] args ) {
  FastReader sc = new FastReader ( ) ;
  int size = sc . nextInt ( ) ;
  long a [ ] = new long [ size ] ;
  int c = 0 ;
  for ( int u = 0 ;
  u < size ;
  u ++ ) {
    a [ u ] = sc . nextLong ( ) ;
    if ( a [ u ] != 1 ) {
      c ++ ;
    }
  }
  Arrays . sort ( a ) ;
  if ( c != 0 ) {
    System . out . print ( "1 " ) ;
    for ( int u = 0 ;
    u < size - 1 ;
    u ++ ) {
      System . out . print ( a [ u ] + " " ) ;
    }
  }
  if ( c == 0 ) {
    for ( int u = 0 ;
    u < size - 1 ;
    u ++ ) {
      System . out . print ( a [ u ] + " " ) ;
    }
    System . out . print ( "2 " ) ;
  }
  System . out . println ( ) ;
}

public static void main ( String [ ] args ) { FastReader sc = new FastReader ( ) ; int size = sc . nextInt ( ) ; long a [ ] = new long [ size ] ; int c = 0 ; for ( int u = 0 ; u < size ; u ++ ) { a [ u ] = sc . nextLong ( ) ; if ( a [ u ] != 1 ) { c ++ ; } } Arrays . sort ( a ) ; if ( c != 0 ) { System . out . print ( "1 ▁ " ) ; for ( int u = 0 ; u < size - 1 ; u ++ ) { System . out . print ( a [ u ] + " ▁ " ) ; } } if ( c == 0 ) { for ( int u = 0 ; u < size - 1 ; u ++ ) { System . out . print ( a [ u ] + " ▁ " ) ; } System . out . print ( "2 ▁ " ) ; } System . out . println ( ) ; }
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