How to solve the Nexon Game Code Algorithm

The NX Cash code is a 20 char* code that appears random just like any other type of code or serial. However, it follows a certain pattern. They all follow the same subset, as if a letter appears first, its rules will apply to the next 3 characters. Likewise, if a number appears first, then the rules will apply to the next 3 characters. There are 20 characters total split up into sets of four.

If the 1st character is a number, it can be any numeral ranging from zero to nine. This is chosen at random. Afterwards if the 1st letter in the free NX Cash generator code is a number then the second character will be the (first number +2)*2. This must be the numerical equivalent to letters so ABC are automatically eliminated from the second character and D is the lowest it can be ( if the first character is a zero ). The third character is going to be the biggest prime number out of the numerical equivalent of the second number. So if it was D, it would be three. Lets look at our code so far. 0D3. The fourth character will be all 3 added together divided by four rounded to the nearest whole number. 0+4+3 = 7 / 4 = 1.75 = two. So the first 4 digits would be 0D32.

This goes on a long ways for the entire code.