instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a bike sitting parked next to a cart in front of some boxes'. Replace the letter 't' with 'x' in the sentence.
answer:
a bike sixxing parked nexx xo a carx in fronx of some boxes


question:
Sentence: 'vita mix blender with something in it already blended'. Replace the letter 'b' with 'a' in the sentence.
answer:
vita mix alender with something in it already alended


question:
Sentence: 'a college student skates beside a sidewalk in a blurry photo'. Replace the letter 'd' with 'r' in the sentence.
answer:

a college sturent skates besire a sirewalk in a blurry photo