In this task, you need to replace a letter in the sentence with another given letter.

Input: Consider Input: Sentence: 'a tower type building structure with a large clock and many windows in front of a cloudy blue sky'. Replace the letter 'n' with 'x' in the sentence.

Output: a tower type buildixg structure with a large clock axd maxy wixdows ix froxt of a cloudy blue sky

Input: Consider Input: Sentence: 'a large bedroom with art over the bed'. Replace the letter 'r' with 'o' in the sentence.

Output: a laoge bedooom with aot oveo the bed

Input: Consider Input: Sentence: 'an extended bus with bicycle on front rack'. Replace the letter 'i' with 'k' in the sentence.
Output: an extended bus wkth bkcycle on front rack