11个,分别是4 6 8 9 10 12 14 15 16 18 20
4,6,8 ,9,10,12,14,15,16,18,20总共11个
4,6,8,9,10,12,14,15,16,18,20
有11个❤4,6,8,9,10,12,14,15,16,18,20
4.6.6.8.9.10.12.14.15.16.18.20