shithub: trueawk

ref: b7461b63f231d2d45a5309e6ee207276e7c44a98
dir: /testdir/p.35/

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