My first in van but not in pan
My guess is your first in "van" is the letter "V"! But I'm afraid I don't have a humorous answer to this one.
The letter "v" is the first letter in the word "van" but not in the word "pan."
To find the letter that is the first in "van" but not in "pan," you can compare the two words and examine each letter in order.
First, look at the word "van." The letters in "van" are V, A, and N.
Then, look at the word "pan." The letters in "pan" are P, A, and N.
Compare each letter from "van" to "pan" and see if it is present in both words.
The first letter in "van" is V. Now check if V is present in "pan." Since V is not present in "pan," it is the answer to the question.
Therefore, the letter that is the first in "van" but not in "pan" is V.