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

Ex Input:
Sentence: 'a well dressed man standing near his early bicycle'. Replace the letter 'e' with 'd' in the sentence.

Ex Output:
a wdll drdssdd man standing ndar his darly bicycld

Ex Input:
Sentence: 'a group of people walking along a dirty snow covered road'. Replace the letter 'n' with 'i' in the sentence.

Ex Output:
a group of people walkiig aloig a dirty siow covered road

Ex Input:
Sentence: 'some basketball players are playing basketball and some people watching them'. Replace the letter 't' with 'u' in the sentence.

Ex Output:
some baskeuball players are playing baskeuball and some people wauching uhem