Explanation of options:
-v: Don't suppress duplicate lines. (It doesn't make a difference here, because there's always only one line.)
-An: Don't write input offsets.
-N4: Read at most 4 bytes.
-tu4: Print 4-byte unsigned integers.
-v: Don't suppress duplicate lines. (It doesn't make a difference here, because there's always only one line.)
-An: Don't write input offsets.
-N4: Read at most 4 bytes.
-tu4: Print 4-byte unsigned integers.