Position of the program stars in the [C/N] vs. T_eff diagram. The filled triangle represents HE 2148−2039, and the filled square represents HE 2155−2043. Filled circles represent the CEMP stars from the literature (M. Spite et al. 2006; W. Aoki et al. 2007; T. Hansen et al. 2014; A. Goswami et al. 2016, 2024; M. Purandardas et al. 2019a, 2019b, 2025, 2026; P. P. Goswami et al. 2021; J. Shejeelammal et al. 2021). The dashed line separates the mixed and unmixed regions in plot.