center of similitude of two circles

bilirubin monoglucuronide breast-strokes Broca's ataxia Chinese sweet gum coaltar pitch diethylaniline hydrochloride fern leaf crystal gearbox main drive shaft hemipristis elongata ischemic necrosis of bone make no noise orophotus chinensis partial multiple correlation coefficient Pieres poyntz sever relations with tight as a drum tumultuations vertebrotomy zero deflection method