#!/usr/bin/env python
import sys

def main(argv):
    all = []
    for fn in argv[1:]:
        all += open(fn, "r").read().decode("latin-1").split("\n")
        
    def last_name(item):
        names = item.strip().split(" ")
        if "II" in item:
            return names[-2]
        return names[-1]
    final = list(set(all))
    final.sort(key=last_name)
    print "\n".join(final).encode("latin-1")
    return 0

if __name__ == "__main__":
    sys.exit(main(sys.argv))