mother	father	sex	count
1	1	1	114
1	2	1	231
1	3	1	33
1	4	1	308
1	1	0	93
1	2	0	237
1	3	0	37
1	4	0	279
2	1	1	218
2	2	1	685
2	3	1	71
2	4	1	877
2	1	0	206
2	2	0	640
2	3	0	72
2	4	0	800
3	1	1	24
3	2	1	63
3	3	1	8
3	4	1	84
3	1	0	30
3	2	0	51
3	3	0	9
3	4	0	79
4	1	1	267
4	2	1	843
4	3	1	94
4	4	1	1014
4	1	0	293
4	2	0	803
4	3	0	101
4	4	0	989