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

Ex Input:
Sentence: 'a chocolate cake decorated with strawberries on the side'. Replace the letter 'c' with 'x' in the sentence.

Ex Output:
a xhoxolate xake dexorated with strawberries on the side


Ex Input:
Sentence: 'children trying little hamburgers from a tray at school'. Replace the letter 'y' with 'l' in the sentence.

Ex Output:
children trling little hamburgers from a tral at school


Ex Input:
Sentence: 'a man standing in a kitchen preparing food'. Replace the letter 's' with 'u' in the sentence.

Ex Output:

a man utanding in a kitchen preparing food