(FNR <= 5) {
print ((FILENAME ": ") $0);
}
cou-en.data: USSR 8649 275 Asia
cou-en.data: Canada 3852 25 North America
cou-en.data: China 3705 1032 Asia
cou-en.data: USA 3615 237 North America
cou-en.data: Brazil 3286 134 South America