% telnet localhost 4321
 Connected to localhost.
 Escape character is '^]'.
 0 4 7 5 2 6 1 3
 0 5 7 2 6 3 1 4
 0 6 3 5 7 1 4 2
 0 6 4 7 1 3 5 2
 1 3 5 7 2 0 6 4
 ....