input.txt

Month	Contribution	Amount won by the bidder	Chit fund organizer commission	Net amount recd by Bid winner	Amount returned to everyone in the group
1	2000	40000	2500	37500	400
2	2000	42000	2500	39500	320
3	2000	45000	2500	42500	200
4	2000	48000	2500	45500	80
5	2000	40000	2500	37500	400
6	2000	42000	2500	39500	320
7	2000	43000	2500	40500	280
8	2000	44000	2500	41500	240
9	2000	40000	2500	37500	400
10	2000	42000	2500	39500	320
11	2000	45000	2500	42500	200
12	2000	48000	2500	45500	80
13	2000	40000	2500	37500	400
14	2000	42000	2500	39500	320
15	2000	43000	2500	40500	280
16	2000	43000	2500	40500	280
17	2000	41000	2500	38500	360
18	2000	42000	2500	39500	320
19	2000	45000	2500	42500	200
20	2000	45000	2500	42500	200
21	2000	44000	2500	41500	240
22	2000	46000	2500	43500	160
23	2000	47000	2500	44500	120
24	2000	48000	2500	45500	80
25	2000	50000	2500	47500	0