多项选择题
A.public int blipvert（int x）{return 0；}
B.private int blipvert（int x）{return 0；}
C.private int blipvert（long x）{return 0；}
D.protected int blipvert（long x）{return 0；}
E.protected long blipvert（long x）{return 0；}
F.protected long blipvert（int x， int y）{return 0；}
