Distribution of [N/Fe] vs. [C/Fe] in the CEMP population predicted by γ2-model set E_q with q-dependent WRLOF. Darker grey indicates greater density of stars. Crosses are data from our selection of SAGA database. Average error bars of the observations are shown in the top-left corner. CEMP stars appear to the right of the vertical dotted line. CNEMP stars enhanced both in carbon and nitrogen appear above the diagonal dotted line.