All characters starting with "X" including all punctation that follows or precedes it should have a green background (this is the ::first-letter).

X"((" (1)

X"(" (2)

X"(" (3)

X"" (4)

X"" (5)

X(" (6)

X(" (7)

X" (8)

X" (9)

X'" (10)

X" (11)

" (12)

" (13)

"X( (14)

"X" (15)

X" (16)

"X( (17)

"X" (18)

"X(" (19)

"X" (20)

"X(" (21)

"X'" (22)

"X(" (23)