instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a giraffe looking over a fence and another reaching over the fence'. Replace the letter 'l' with 'h' in the sentence.
answer:
a giraffe hooking over a fence and another reaching over the fence


question:
Sentence: 'a group of women are sitting at a table eating lunch'. Replace the letter 'e' with 'k' in the sentence.
answer:
a group of womkn ark sitting at a tablk kating lunch


question:
Sentence: 'two sheep grazing next to each other on a green field'. Replace the letter 'e' with 't' in the sentence.
answer:

two shttp grazing ntxt to tach othtr on a grttn fitld