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

Ex Input:
Sentence: 'the view from inside the water looking landward at the beach'. Replace the letter 'a' with 's' in the sentence.

Ex Output:
the view from inside the wster looking lsndwsrd st the besch


Ex Input:
Sentence: 'a back pack and lap top sit on the kitchen counter'. Replace the letter 't' with 'k' in the sentence.

Ex Output:
a back pack and lap kop sik on khe kikchen counker


Ex Input:
Sentence: 'a passenger train moving along one of several tracks that are side by side'. Replace the letter 'e' with 'r' in the sentence.

Ex Output:

a passrngrr train moving along onr of srvrral tracks that arr sidr by sidr