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

Sentence: 'a crowd watches as giraffes graze the tree tops at the zoo'. Replace the letter 't' with 'q' in the sentence.
a crowd waqches as giraffes graze qhe qree qops aq qhe zoo

Sentence: 'several older electronics, including cellular phones and a palm pilot with a  broken screen next to each other in white box enclosure'. Replace the letter 'u' with 't' in the sentence.
several older electronics, incltding celltlar phones and a palm pilot with a  broken screen next to each other in white box enclostre

Sentence: 'several trays of a variety of pastries for sale'. Replace the letter 'e' with 'w' in the sentence.

swvwral trays of a variwty of pastriws for salw