instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.
answer:
a bunsh of signs on a pole on the street


question:
Sentence: 'an airplane moves through the skies above a snowy mountain range'. Replace the letter 'l' with 's' in the sentence.
answer:
an airpsane moves through the skies above a snowy mountain range


question:
Sentence: 'a wedding cake with purple ribbon and flower designs on it'. Replace the letter 'e' with 'd' in the sentence.
answer:

a wddding cakd with purpld ribbon and flowdr ddsigns on it