n=30=self-2=n3=ne4=w6=e7=sw8=s的一些解（倒数方向总计10）
.00.67.47...00.00.00...00.67.48...68.47.00...00.78.78...00.68.48...00.67.48
.38.36.47...00.78.00...38.00.27...23.00.00...38.23.27...68.24.27...36.48.27
.26.34.00...36.24.00...26.34.00...00.00.00...26.34.00...26.34.00...00.23.00
