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I'm certain Don Cragun will accept the apologies. The forum maintainers' attitude is less to not to become useless - people in here REALLY like to help with also minor problems - but to keep up the...

If you don't mind reading the file twice, it is pretty simple with awk:
awk -v cnt=2 '
FNR == NR {
c[$1]++
c[$3]++
c[$5]++
c[$7]++
next
}
c[$1] >= cnt && c[$3] >= cnt && c[$5] >= cnt &&...

No reason to become ironic. This forum has a high reputation of NOT helping students and / or candidates cheat their way through classwork or exams, so questions of that kind are adequate and...