#!/bin/bash
s='There was a farmer, who had a dog
and Bingo : nameo
Bingo: nameio'
awk 'match($0,/Bingo : .*/){print substr($0,RSTART+8,RLENGTH)}' <<< "$s"
sed -n 's/^.*Bingo : \(.*\)/\1/p' <<< "$s"
grep -oP 'Bingo : \K.+' <<< "$s"
IyEvYmluL2Jhc2gKcz0nVGhlcmUgd2FzIGEgZmFybWVyLCB3aG8gaGFkIGEgZG9nCmFuZCBCaW5nbyA6IG5hbWVvCkJpbmdvOiBuYW1laW8nCmF3ayAnbWF0Y2goJDAsL0JpbmdvIDogLiovKXtwcmludCBzdWJzdHIoJDAsUlNUQVJUKzgsUkxFTkdUSCl9JyA8PDwgIiRzIgpzZWQgLW4gJ3MvXi4qQmluZ28gOiBcKC4qXCkvXDEvcCcgPDw8ICIkcyIKZ3JlcCAtb1AgJ0JpbmdvIDogXEsuKycgPDw8ICIkcyIK