1.BDE 2.BCDE 3.ABDE 4.ABCE 5.AC 6.ACDE 7.ABCD
8.ACDE 9.ABCE 10.ABDE 11.BCDE 12.BCD 13.ABCD 14.BCDE(https://www.daowen.com)
15.CDE 16.ABCE 17.BCE 18.ABCD 19.ADE 20.CDE
