Dim a(1 To 5) As Integer

Dim f As Boolean

a(1) = 23: a(2) = 12: a(3) = 56: a(4) = 34: a(5) = 10

i = 1: f = True

Do While i <= 5 And f = True

  If a(i) = 56 Then f = False

  i = i + 1

Loop

Label1.Caption = i

For i = 1 To 3

 For j = 1 To 10

  If j Mod i = 0 Then a(j) = 1 - a(j)

 Next j

Next i

sum = 0

For i = 1 To 10

 sum = sum + a(i)

Next i

已知数组a的所有元素初值均为0，运行上述程序段后，变量sum的值是（  ）

import random s="12345678"

g=""

for i in range(3):

    n=len(s)

    pos=random.randint(1,n-1)

    g+=s[pos]

    s=s[0:pos]+s[pos+1:n] print(g)

在该程序段执行时，变量 g 的值可能为 （   ）