(加试题)有如下VB程序段: Dim a(1 To 6) As String Text1.Text = "" For i = 1 To 3 For j = 1 To 6 - i If a(j) < a(j + 1) Then t = a(j): a(j) = a(j + 1): a(j + 1) = t Next j Text1.Text = Text1.Text + a(j) Next i 数组元素a(1)到a(6)的值依次是“231”,“123”,“12”,“59”,“41”,“33”。若该程序段执 行后,文本框Text1显示的内容是( )