You are given a content of CSV-file with information about set of trades. It contains the following columns:
TIME - Timestamp of a trade in format Hour:Minute:Second.Millisecond PRICE - Price of one share SIZE - Count of shares executed in this trade EXCHANGE - The exchange that executed this trade For each exchange find the one minute-window during which the largest number of trades took place on this exchange.
Sample
Input
09:30:01.034,36.99,100,V
09:30:55.000,37.08,205,V
09:30:55.554,36.90,54,V
09:30:55.556,36.91,99,D
09:31:01.033,36.94,100,D
09:31:01.034,36.95,900,V
Output
2
3