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Proofgold Proof

pf
Apply nat_ordsucc_in_ordsucc with 13, 4 leaving 2 subgoals.
The subproof is completed by applying nat_13.
The subproof is completed by applying unknownprop_fabb5ebdd9913b5bd1e996af7e3e33a951cdac9d03915fded834346562485266.