U6A47KETHW2CBBRODZQLHQRUVHVXL7OLF3TKJTQA5OPZO43B3BCQC
2V4VNNOWTOFSM22PBTFKP73NMTFDYCHFKWTMD4BJVSXA3DGI33KAC
printf("x[%d]: %g\n", idx, xL);