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

Example Input: Sentence: 'two men running for a soccer ball on a field'. Replace the letter 'd' with 'a' in the sentence.
Example Output: two men running for a soccer ball on a fiela

Example Input: Sentence: 'a truck transports things down the road'. Replace the letter 'd' with 's' in the sentence.
Example Output: a truck transports things sown the roas

Example Input: Sentence: 'a woman is custom painting a red umbrella'. Replace the letter 't' with 'z' in the sentence.
Example Output:
a woman is cuszom painzing a red umbrella