执行下面程序,单击命令按钮Command1,窗体上显示的第一行内容是（）,第二行内容是（）,第三行内容是（）.

Option Explicit

Private Sub Command1_Click()

Dim a As Integer, b As Integer, i As Integer

a = 1

b = 5

For i = b To a Step -1

a = a + i

b = b + a

If b > 30 Then Exit For

Print a, b

Next i

Print a, b

End Sub