#!/bin/bashs='$2y$15$nK/B6u765645/lo0867h56546v/BnH5U5g45Aj67u67nMVtrhryt6'grep -Ea '\$2[ayb]\$.{56}' <<< "$s"
Standard input is empty
$2y$15$nK/B6u765645/lo0867h56546v/BnH5U5g45Aj67u67nMVtrhryt6
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