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

Sentence: 'a blue and white train is coming down some tracks'. Replace the letter 'b' with 'u' in the sentence.
a ulue and white train is coming down some tracks

Sentence: 'the color theme in this kitchen is red and black'. Replace the letter 't' with 'v' in the sentence.
vhe color vheme in vhis kivchen is red and black

Sentence: 'a table in a bookstore's cafe with a laptop'. Replace the letter 'o' with 'h' in the sentence.

a table in a bhhksthre's cafe with a lapthp