Zhang, Wang, Li and Zhao plan to take annual leave for one month from June to September, but the department is short of manpower
no two people can take a holiday in a month. Zhao did not want to arrange it in June. Zhang asked not to arrange it in September. Li said that it could be either June or August. Wang suggested that it could only be arranged in July or August.
As long as Li is not in June, Wang will be in July.