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

Ex Input:
Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.

Ex Output:
many stxeet signs in fxont of a building while it is snowing


Ex Input:
Sentence: 'a man loads bananas high on top of a banana truck'. Replace the letter 'f' with 'c' in the sentence.

Ex Output:
a man loads bananas high on top oc a banana truck


Ex Input:
Sentence: 'a tennis player scrambles to hit a tennis ball during a match'. Replace the letter 't' with 'f' in the sentence.

Ex Output:

a fennis player scrambles fo hif a fennis ball during a mafch