=0 0=0pt = 0pt >0 = 0= 00 0< 0 by 0 0 by 0> 0 0> 0 by -1 0=0 1=0 0=0 0 0< =0 0 0 0 by 1 by 0 by 0 by >0 = 0= 00 0< 0 by 0 0 by 0> 0 0> 0 by -1 0=0 1=0 0=0 0 0< =0 0 0 0 by 1 by 0 by 0 by 255255>-MM