\setlabel{a}{48.600000}{4.162104}{0.000000}{1.000000} \setlabel{b}{4.162104}{48.600000}{1.000000}{0.000000} \setlabel{a'}{48.600000}{93.037896}{0.000000}{-1.000000} \setlabel{b'}{93.037896}{48.600000}{-1.000000}{0.000000}