wrong but right math

import re, random
def index(sclst):
    return max([ i for i, wd in enumerate(sclst) if re.compile(".\s*").match(wd)])

l1 = random.sample(xrange(100), random.randint(0, 100))
l2 = random.sample(xrange(100), random.randint(0, 100))
print("%s + %s = %s" %(index(l1), index(l2), index(l1+l2))