#COMPILE EXE
  #DIM ALL
  GLOBAL a, i, j, k, n  AS INTEGER
  GLOBAL d, ns, s AS STRING 'dynamic string
  FUNCTION PBMAIN () AS LONG
  ns = INPUTBOX$("   n =",, "3") 'input n
  n = VAL(ns)
  DIM a(1 TO n) AS INTEGER
  FOR i = 1 TO n: a(i)= i: NEXT
  DO
    s = " "
    FOR i = 1 TO n
      d = STR$(a(i))
      s = BUILD$(s, d) '  s & d concatenate
    NEXT
    ? s  'print and pause
    i = n
    DO
     DECR i
    LOOP UNTIL i = 0 OR a(i) < a(i+1)
    j = i+1
    k = n
    DO WHILE j < k
      SWAP a(j), a(k)
      INCR j
      DECR k
    LOOP
    IF i > 0 THEN
      j = i+1
      DO WHILE a(j) < a(i)
        INCR j
      LOOP
      SWAP a(i), a(j)
    END IF
  LOOP UNTIL i = 0
  END FUNCTION