instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a building has a clock on the top of it'. Replace the letter 'l' with 'x' in the sentence.
answer:
a buixding has a cxock on the top of it


question:
Sentence: 'a white plate topped with meat and greens'. Replace the letter 's' with 'b' in the sentence.
answer:
a white plate topped with meat and greenb


question:
Sentence: 'a german shephard is running in a field'. Replace the letter 'n' with 'c' in the sentence.
answer:

a germac shephard is ruccicg ic a field