void S2cs(double telog, 
	  double *cs12, 
	  double *cs13, 
	  double *cs14, 
	  double *cs15, 
	  double *cs23, 
	  double *cs24, 
	  double *cs25, 
	  double *cs34, 
	  double *cs35, 
	  double *cs45);