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For $p=1$ the average sizes of a community $s_{av}$ and of the giant community $s_g$ show a power-law increase $s_{av}\\sim n^{\\alpha'}$ and $s_g\\sim n^{\\alpha}$. From numerical results we estimate $\\alpha'\\approx 0.26(1)$, $\\alpha\\approx 0.50(1)$, and using the probability distribution of sizes of communities we suggest that $\\alpha'=\\alpha/2$ should hold. 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