>>> from curses import difer_s

>>> difer_s(3, 23, 17, 3, 34, 1)
644
>>> difer_s(3, 23, 17, 3, 23, 16)
1
>>> difer_s(3, 23, 17, 3, 24, 17)
60
>>> difer_s(4, 0, 0, 3, 56, 31)
209