Zhang, Wang, Li and Zhao plan to take annual leave for one month from June to September, but the department is short of manpower, so 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.
If the requirements of all four people are met, then it can be inferred that if Wang is arranged in July, Li is arranged in June.