#!/usr/bin/python

import re #import the regular expression module

line = "Now we are upgrading the PSI3 program"
matchstr = re.search("PSI3", line)
print "Match starts at character ", matchstr.start()
print "Match ends at character ", matchstr.end()
print "Before match: ", line[0:matchstr.start()]
print "After match:", line[matchstr.end():]