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

Sentence: 'a couple of horses with carriages at a building'. Replace the letter 'u' with 'm' in the sentence.
a comple of horses with carriages at a bmilding

Sentence: 'a woman in a dining-room holding a knife, cutting a cake on the table'. Replace the letter 'i' with 'p' in the sentence.
a woman pn a dpnpng-room holdpng a knpfe, cuttpng a cake on the table

Sentence: 'the woman wearing a coat stands near sheep behind a fence'. Replace the letter 'i' with 'w' in the sentence.

the woman wearwng a coat stands near sheep behwnd a fence