#!/usr/bin/python

from __future__ import print_function

class _tri(object):
    infts = '(+/-)inf, (+/-)infty, (+/-)infinity'

    works = {s.replace('(+/-)',''):None for s in infts.split(', ')}

    strange_working = {}
    for s in infts.split(', '):
        for x in ('+','-',''):
            strange_working[x+s.replace('(+/-)','')] = None

    strange_also_working = {x+s.replace('(+/-)',''):None for x in ('+','-','') for s in '(+/-)inf, (+/-)infty, (+/-)infinity'.split(', ')}

    strange_failing = {x+s.replace('(+/-)',''):None for x in ('+','-','') for s in infts.split(', ')}