if a $result contains the following, what is the best way to grab only 12.2(18)SXF8 ?
SNMPv2-MIB::sysDescr.0 = STRING: Cisco Internetwork Operating System Software
IOS (tm) s72033_rp Software (s72033_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(18)SXF8, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2007 by cisco Systems, Inc.
SNMPv2-MIB::sysDescr.0 = STRING: Cisco Internetwork Operating System Software
IOS (tm) s72033_rp Software (s72033_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(18)SXF8, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2007 by cisco Systems, Inc.