9201没有
9202不行
920314,920315,920316,920317,920318,三月有5天
920413,920415,920416,920417,920418,四月有5天
920513,920514,920516,920517,920518,920531五月有6天
920613,920614,920615,920617,920618,六月有5天
920713,920714,920715,920716,920718,920731七月有6天
920813,920814,920815,920816,920817,920831八月有6天
九月不行,十月不行,十一月不行,十二月也不符合.
所以一共有:5+5+6+5+6+6= 33天