$ grep -E "78B-1t1c-ethip6-ip6[a-z0-9]+-[a-z-]*ndrdisc" *
10ge2p1x520-ethip6-ip6base-copwhtlistbase-ndrpdrdisc.robot:| tc01-78B-1t1c-ethip6-ip6base-copwhtlistbase-ndrdisc
$ grep -E "78B-1t1c-ethip6-ip6[a-z0-9]+-[a-z-]*ndrdisc" *
10ge2p1x520-ethip6-ip6base-copwhtlistbase-ndrpdrdisc.robot:| tc01-78B-1t1c-ethip6-ip6base-copwhtlistbase-ndrdisc