foo 9 -2
PING localhost (127.0.0.1): 56 data bytes

--- localhost ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
10
PING localhost (127.0.0.1): 56 data bytes

--- localhost ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
11
PING localhost (127.0.0.1): 56 data bytes

--- localhost ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
12