#!/bin/bash
sed -nE 's/^\[(DEBUG|SYSTEM)\] (.*) FAIL.*/\2/p' <<<"
[SYSTEM] capture ............................... FAIL [ 2.825 s]
[SYSTEM] capture ............................... FAIL [ 2.825 s]
[DEBUG] capture :: capture :: capture .......... FAIL [ 0.866 s]
[DEBUG] capture :: me :: capture capture capture FAIL [ 0.876 s]
[DEBUG] capture-me ............................. FAIL [ 0.361 s]
" | tr -d .
IyEvYmluL2Jhc2gKCnNlZCAtbkUgJ3MvXlxbKERFQlVHfFNZU1RFTSlcXSAoLiopIEZBSUwuKi9cMi9wJyA8PDwiCltTWVNURU1dIGNhcHR1cmUgLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLiBGQUlMIFsgIDIuODI1IHNdCltTWVNURU1dIGNhcHR1cmUgLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLiBGQUlMIFsgIDIuODI1IHNdCltERUJVR10gY2FwdHVyZSA6OiBjYXB0dXJlIDo6IGNhcHR1cmUgLi4uLi4uLi4uLiBGQUlMIFsgIDAuODY2IHNdCltERUJVR10gY2FwdHVyZSA6OiBtZSA6OiBjYXB0dXJlIGNhcHR1cmUgY2FwdHVyZSBGQUlMIFsgIDAuODc2IHNdCltERUJVR10gY2FwdHVyZS1tZSAuLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLiBGQUlMIFsgIDAuMzYxIHNdCiIgfCB0ciAtZCAuIAo=