gistfile1.py

#!/usr/bin/env python

import sys

seen = {}

for lineNumber, line in enumerate(sys.stdin):
    if lineNumber:
        fields = line.split('|')
        key = '|'.join(fields[:2] + fields[3:])
        if key in seen:
            if seen[key]:
                print
                print seen[key],
                seen[key] = None
            print line,
        else:
            seen[key] = line