Adding text between listboxes items

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VB

ListBox

I'm using vb.net form.

I have 8 listboxes (listbox1 , listbox2,listbox3..) each one contains many items and another empty listbox (listbox10). I'm trying to add first listboxes items into the listbox10

ex: listbox1 first items is "A" , listbox2 first items is "B" , listbox3 first items is "C"...etc . Now listbox10 first item must be "Abc...";

The problem is i want to add text ( string or number) between each listbox

ex: listbox1 first items is "A" , listbox2 first items is "B" , listbox3 first items is "C"...etc . Now I want listbox10 first item to be "The letters A is before B and now C"

here is my code

Dim controls = New List(Of ListBox)() From _
{ListBox1, ListBox2, ListBox3, ListBox4, ListBox5, ListBox6, ListBox7, ListBox8}
    Dim minCount = Controls.Min(Function(x) x.Items.Count)
    For x = 1 To minCount - 1
        ListBox10.Items.Add(String.Join(" ", controls.Select
        (Function(lb) lb.Items(x).ToString)))
    Next

End Sub

Where i must to add my string/text?