#!/bin/bash grep -ozP '(?ms)^PQXY(?:(?!PQXY|OFEJ).)*OFEJ(\R|\z)'
PQXY fffffiiiiivvvvveeeee 30 40 PQXY 50 60 OFEJ 70 ffffOOOOuuuurrrr PQXY fffffiiiiivvvvveeeee 3 4 5 6 OFEJ 7