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

Ex Input:
Sentence: 'a bus all lite up inside and out with diffrent colors '. Replace the letter 'r' with 'w' in the sentence.

Ex Output:
a bus all lite up inside and out with diffwent colows 


Ex Input:
Sentence: 'a giraffe walking in its natural habitat on the savannah'. Replace the letter 't' with 'u' in the sentence.

Ex Output:
a giraffe walking in ius nauural habiuau on uhe savannah


Ex Input:
Sentence: 'a man in black is in various positions as he jumps a snow hill'. Replace the letter 'b' with 'n' in the sentence.

Ex Output:

a man in nlack is in various positions as he jumps a snow hill