Measured (circles) and calculated with RELDIS~ (red solid-line histogram) cross sections of the emission of a given number of protons $k$ accompanied by at least one neutron in UPCs of $^{208}$Pb nuclei at $\sqrt{s_{\mathrm{NN}}}=5.02$~TeV. Calculated cross sections of the production of specific elements, Pb, Tl, Hg, ..., Hf, at this collision energy are represented by the black dashed-line histograms marked with nuclide symbols. Charge-changing cross sections of the production of specific elements measured in collisions of $^{208}$Pb with Au and Pb at $\sqrt{s_{\mathrm{NN}}}=17.21$~GeV ~ with subtracted hadronic contribution (see text for details) are presented by the solid and open squares and compared with RELDIS results (blue long-dash histogram). The error bars represent combined statistical and systematic uncertainties of the measurements.