diff --git a/sheets/nl b/sheets/nl
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index 0000000..b82cd57
--- /dev/null
+++ b/sheets/nl
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+# Number lines given to `nl` via STDIN.
+printf "Here\nis\nsome\nexample\ntext." | nl
+
+# Number (all) lines given to `nl` via provided file(s).
+nl -b a /path/to/file
+# The above can also be achieved with `cat`, which is perhaps more portable:
+cat -n /path/to/file