import sys, re, string

pat = re.compile('[a-m]+')

def replacer(mo):
    return string.upper(mo.group(0))

print 'Upper-casing a-m.'
while 1:
    target = raw_input('Enter a target line ("q" to quit): ')
    if target == 'q':
        break
    result = pat.sub(replacer, target)
    print 'result: %s' % result