256	9216	female
9216	18176	produces
18176	18688	a
18688	24576	litter
24576	26368	of
26368	30208	two
30208	31488	to
31488	36352	four
36352	42496	young
42496	45056	in
45056	51200	november
51200	54272	and
54272	61184	december