Give pls some tests, for different errors

4 5 7 13
3 6 11 99
6 8 11 99
10 13 20 200
50 56 20 200
30 33 20 200
19 21 20 200
11 11 20 200
10 10 20 200
10 15 17 18
10 15 16 19
10 15 15 20
20 33 14 19
1 1 1 1
2222222222222221 2222222222222222 100000000000000000 200000000000000000
16 19 5 11
10 33 16 25
10 21 16 25
1 2 18 20
1 2 19 20
1 2 20 20
30 33 30 33
30 33 31 32

Answers:
5
89
87
178
40
69
109
17
19
0
0
2
0
1
3105 or so :)
0
10
10
3
2
1
4
2