Mass lost by the GCs during and after the merger. The orange dashed line is for CM1, the blue solid line is for CM2, and the purple dot-dashed line is for CM12. The green dotted line and the purple solid line with bullets are for the non-interacting C2-like clusters with 10⁷ M_⊙ and 2 × 10⁷ M_⊙, respectively, moving on the orbit of CM2. The mass loss is large in the case of CM2, intermediate for CM1 and CM12, and low for the non-interacting clusters.