shithub: trueawk

ref: 829f5258e66609a91efebe72e18d7cd5e80987f9
dir: /testdir/p.35/

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BEGIN			{ FS = OFS = "\t" }
$4 ~ /^North America$/	{ $4 = "NA" }
$4 ~ /^South America$/	{ $4 = "SA" }
			{ print }