#!/bin/bash
s='1<host1<host1.network.org<<0<10.10.10.0/24<<Ed25519PublicKey = 8dtRRgAaTbUNtPxW9U3nGn6U7uvfIPwRo1wnx7xMIUH<Subnet = 10.10.3.0/24>1<host2<host2.network.org<<0<10.10.9.0/24<<Ed25519PublicKey = irn48tqF2Em4rIG0ggBmpEfaVKtkl6DmGdSzTHMmVEI<>0<host3<host3.network.org<<0<10.10.11.0/24<<Ed25519PublicKey = wQt1sFwOsd1hnBaNGHq4JDyib22fOg1YqzOp0p08ZTD<>'
echo $s | grep -oP '(?<=<)[^<]+(?=<<[0-9]<)'
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