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Funding statement
C. Escher was supported by a grant from the Association for Women in Mathematics, by the University of Pennsylvania and by IMPA. W. Ziller was supported by a grant from the National Science Foundation, the Max Planck Institute in Bonn and CAPES.
Remove constraint Funding statement: C. Escher was supported by a grant from the Association for Women in Mathematics, by the University of Pennsylvania and by IMPA. W. Ziller was supported by a grant from the National Science Foundation, the Max Planck Institute in Bonn and CAPES.