The only day in a month where Wednesdays are more than Tuesdays is how many years this has happened (Note: May 12, 2013 is a Sunday)
某月里仅有星期三的天数比星期二的天数多，那么发生这种情况的是多少年(注：2013年5月12日是星期日)
<result>2_012</result>