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

Sentence: 'a computer, keyboard, and mouse sitting on a desk'. Replace the letter 's' with 'c' in the sentence.
a computer, keyboard, and mouce citting on a deck

Sentence: 'a man is on a saddled horse with reins'. Replace the letter 's' with 'o' in the sentence.
a man io on a oaddled horoe with reino

Sentence: 'several trunks and some suitcases stacked on a wooden cart'. Replace the letter 'a' with 'w' in the sentence.

severwl trunks wnd some suitcwses stwcked on w wooden cwrt