set buff "SOME TEXT o=India-SIPUA 6264 0 IN IP4 10.77.33.200"
regexp {.*o=India-SIPUA.*(10\.77\.\d{2}\.200)} $buff match ip
puts $match
puts $ip
c2V0IGJ1ZmYgIlNPTUUgVEVYVCBvPUluZGlhLVNJUFVBIDYyNjQgMCBJTiBJUDQgMTAuNzcuMzMuMjAwIgpyZWdleHAgey4qbz1JbmRpYS1TSVBVQS4qKDEwXC43N1wuXGR7Mn1cLjIwMCl9ICRidWZmIG1hdGNoIGlwCnB1dHMgJG1hdGNoCnB1dHMgJGlwCg==