Through hard work, four middle school students, A, B, C and D, were admitted to four famous universities: Peking University, Tsinghua University, Nanjing University and Southeast University At the beginning of September, A, C and B, D went to two different cities to go to school It is known that First did not go to Peking University  Second B didn't go to Tsinghua University  The third third did not go to Nanjing University
Fourth D didn't go to Southeast University
B didn't go to Peking University