某对分查找算法的VB程序段如下:
Dim a(1 To 10) As Integer
Key = Int(Rnd * 32) * 3 + 3
s = 0: i = 1: j = 10
Do While i <= j
m = (i + j) \ 2
If Key = a(m) Then Exit Do
If Key > a(m) Then
i = m + 1: s = 3 * s + 2
Else
j = m - 1: s = 3 * s
End If
Loop
数组a(1)到a(10)的值依次为“4,7,9,15,24,32,37,54,75,90”,执行该程序段后,s的值不可能为( )