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

Ex Input:
Sentence: 'a person snow skiing down a hill while the hold their ski poles'. Replace the letter 'r' with 'g' in the sentence.

Ex Output:
a pegson snow skiing down a hill while the hold theig ski poles


Ex Input:
Sentence: 'a skier in the midst of a jump'. Replace the letter 'm' with 'd' in the sentence.

Ex Output:
a skier in the didst of a judp


Ex Input:
Sentence: 'a surfer rides a wave while a boat floats in the background'. Replace the letter 'o' with 'v' in the sentence.

Ex Output:

a surfer rides a wave while a bvat flvats in the backgrvund