instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'the cargo train is headed to the next destination'. Replace the letter 'h' with 'x' in the sentence.
answer:
txe cargo train is xeaded to txe next destination


question:
Sentence: 'a woman is snowboarding down a snowy hill'. Replace the letter 'l' with 'b' in the sentence.
answer:
a woman is snowboarding down a snowy hibb


question:
Sentence: 'a giraffe walking in a grassy area surrounded by wooden fence'. Replace the letter 's' with 'w' in the sentence.
answer:

a giraffe walking in a grawwy area wurrounded by wooden fence