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Proofgold Proof

pf
Apply nat_ordsucc_in_ordsucc with 15, 6 leaving 2 subgoals.
The subproof is completed by applying nat_15.
The subproof is completed by applying unknownprop_92f077fe31aef5065d6f394b7909429587961bc7138ef5756fc3f1b72647a12c.