Junos restricted user disallow "ping rapid" and "ping size" operational commands

The following Junos directive will block a Junos user from making use of "rapid" and "size" ping arguments on the CLI.

Code:

allow-commands = "(^show route)|(^show route .*)|(^quit)|(^ping ([^r|s]).+)|(^traceroute .*)|(^show bgp summary)"

And the outcome:

Code:

juniper@CORE_R1> ping ?
Possible completions:
  <host>               Hostname or IP address of remote host
  atm                  Ping remote Asynchronous Transfer Mode node
  bypass-routing       Bypass routing table, use specified interface
  count                Number of ping requests to send (1..2000000000 packets)
  detail               Display incoming interface of received packet
  do-not-fragment      Don't fragment echo request packets (IPv4)
  inet                 Force ping to IPv4 destination
  inet6                Force ping to IPv6 destination
  interface            Source interface (multicast, all-ones, unrouted packets)
  interval             Delay between ping requests (seconds)
  logical-system       Name of logical system
+ loose-source         Intermediate loose source route entry (IPv4)
  mpls                 Ping label-switched path
  no-resolve           Don't attempt to print addresses symbolically
  pattern              Hexadecimal fill pattern
  tos                  IP type-of-service value (0..255)
  ttl                  IP time-to-live value (IPv6 hop-limit value) (1..255 hops)
  verbose              Display detailed output
  vpls                 Ping VPLS MAC address
  wait                 Maximum wait time after sending final packet (seconds)