Three-pion same-charge full ($C_3^{\rm QS}$) and cumulant ($c_3^{\rm QS}$) correlations versus $Q_3$ in Pb-Pb. Expected correlations of the $1^{\rm st}$ type are shown with dashed block histograms with $G=0$. The ratio of measured to expected $C_3^{\rm QS}$ is shown in the bottom panel. The systematic uncertainties are shown by the shaded bands at the top of the figure as explained in Fig. 4(a). The average of the charge conjugated correlation functions is shown.