Direction: Study the following alphabetical sequence and answer the question based on it.
$$\text{G A G H U T A A K H G A O Y Y D K K V R A B I C D D C R F F A H A H A I H}$$

The difference between the number of consonants and the number of vowels in the above series is:

Let us count the total number of elements in the given string:
$$\text{G A G H U T A A K H G A O Y Y D K K V R A B I C D D C R F F A H A H A I H}$$

Total count = $37$ letters.

Let us isolate and count all the vowels ($\text{A, E, I, O, U}$):

* $\text{A}$ appears $8$ times
* $\text{U}$ appears $1$ time
* $\text{O}$ appears $1$ time
* $\text{I}$ appears $2$ times

$$\text{Total Vowels}=8+1+1+2=12$$

Now, calculate the number of consonants:

$$\text{Total Consonants}=\text{Total letters}-\text{Total Vowels}=37-12=25$$

The difference between the number of consonants and vowels is:

$$\text{Difference}=25-12=13$$