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P A R A N O I A

This assignment describes a situation in a company.
ByteCorp is a famous technological company in Byteania.

The CEO of ByteCorp doesn't trust anyone and thinks that his accountant managed to move huge amounts of money to a competitor company, MegaCorp.
He hires a computer crime investigator, and asks him to find inconsistencies in the money transfers.

Here is a sample transaction log of the company:
Feb SLR 4 M
Feb ENT 800 K
Mar SLR 4000 K
Mar ENT 800 K
Apr SLR 4010 K
Apr ENT 810 K

There are four columns:
1. Month of the transaction
2. Reason of the expense (SLR for "salary", ENT for "entertainment", OTR for "other")
3. Amount
4. M, K, or B (M for million, K for thousands, B for billion)

In the example above, April expenses show an inconsistency and should be reported.

Another example:
Jul SLR 4 M
Jul ENR 800 K
Jul OTR 1200 K
Aug SLR 4000 K
Aug ENR 800 K
Aug OTR 1190 K
Sep SLR 4000 K
Sep ENR 800 K
Sep OTR 1190 K

Here, July expenses show an inconsistency and should be reported..

As the computer investigator, write a program, which reads the transaction logs, detects inconsistent expenses and prints the exact month containing the "unusual" activities.

The number of lines in the transaction log, as well as the reasons, are not fixed and can contain other values.

Paranoia