s1 = "python": s2 = "visual" i = 1: j = 1: s = ""
Do While i <= Len(s1) And j <= Len(s2)
If Mid(s1, i, 1) >= Mid(s2, j, 1) Then s = s + Mid(s1, i, 1)
Else
j = j + 1
End If
i = i + 1
Loop
执行该程序后,j的值是( )