Problem description

PROBLEM.md

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+# Merchant Guide to the Galaxy
+
+### Description
+You decided to give up on earth after the latest financial collapse left 99.99% of the earth's
+population with 0.01% of the wealth. Luckily, with the scant sum of money that is left in your
+account, you are able to afford to rent a spaceship, leave earth, and fly all over the galaxy to sell
+common metals and dirt (which apparently is worth a lot).
+
+Buying and selling over the galaxy requires you to convert numbers and units, and you decided
+to write a program to help you.
+
+The numbers used for intergalactic transactions follows similar convention to the roman
+numerals and you have painstakingly collected the appropriate translation between them.
+[Roman numerals](https://en.wikipedia.org/wiki/Roman_numerals) are based on seven symbols:
+
+Symbol|Value
+------|-----
+I|1
+V|5
+X|10
+L|50
+C|100
+D|500
+M|1,000
+
+Numbers are formed by combining symbols together and adding the values. For example, MMVI
+is 1000 + 1000 + 5 + 1 = 2006. Generally, symbols are placed in order of value, starting with the
+largest values. When smaller values precede larger values, the smaller values are subtracted
+from the larger values, and the result is added to the total. For example MCMXLIV = 1000 +
+(1000 − 100) + (50 − 10) + (5 − 1) = 1944.
+
+The symbols "I", "X", "C", and "M" can be repeated three times in succession, but no more. (They
+may appear four times if the third and fourth are separated by a smaller value, such as XXXIX.)
+"D", "L", and "V" can never be repeated.
+
+"I" can be subtracted from "V" and "X" only. "X" can be subtracted from "L" and "C" only. "C" can
+be subtracted from "D" and "M" only. "V", "L", and "D" can never be subtracted.
+Only one small-value symbol may be subtracted from any large-value symbol.
+
+A number written in [Arabic numerals](https://en.wikipedia.org/wiki/Arabic_numerals) can be broken into digits. For example, 1903 is
+composed of 1, 9, 0, and 3. To write the Roman numeral, each of the non-zero digits should be
+treated separately. Inthe above example, 1,000 = M, 900 = CM, and 3 = III. Therefore, 1903 =
+MCMIII.
+
+### Problem
+Input to your program consists of lines of text detailing your notes on the conversion between
+intergalactic units and roman numerals.
+
+You are expected to handle invalid queries appropriately.
+
+#### Test input:
+
+glob is I
+
+prok is V
+
+pish is X
+
+tegj is L
+
+glob glob Silver is 34 Credits
+
+glob prok Gold is 57800 Credits
+
+pish pish Iron is 3910 Credits
+
+how much is pish tegj glob glob ?
+
+how many Credits is glob prok Silver ?
+
+how many Credits is glob prok Gold ?
+
+how many Credits is glob prok Iron ?
+
+how much wood could a woodchuck chuck if a woodchuck could chuck wood ?
+
+#### Test Output:
+
+pish tegj glob glob is 42
+
+glob prok Silver is 68 Credits
+
+glob prok Gold is 57800 Credits
+
+glob prok Iron is 782 Credits
+
+I have no idea what you are talking about