import codecs
import urllib2
import re
req = urllib2.Request('http://en.wikipedia.org/wiki/Bach')
page = urllib2.urlopen(req)
page = page.read()

def find_pages (x):
    y = re.findall('href="/wiki/([^ ]*)"', x)
    return list(set (y))
def find_organ (x):
    y = re.findall('>[^<^>]*[Oo]+[Rr]+[Gg]+[Aa]+[Nn]+[Ss]*[^<^>]*<', x)
    return len(y)

for i in find_pages(page):
    counter = 0
    req2 = urllib2.Request('http://en.wikipedia.org/wiki/' + 'i')
    page2 = urllib2.urlopen(req2)
    page2 = page2.read()
    counter += find_organ (page2)
print counter