Find a single letter that replaces the first letter in the two words of each row to make two new words. What word is formed by combining the new letter of each row?
For example: PLANK _ BRISK
The new letter is F, making FLANK and FRISK. And F would be the first letter of the answer.
AMBER _ KNITS
FAUNA _ WORRY
WARNS _ AERIE
FEMUR _ GAILY
