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: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
a close shot of a stop sign near a uuilding

Sentence: 'bus traveling through a city in front of a clock tower'. Replace the letter 'r' with 'e' in the sentence.

bus teaveling theough a city in feont of a clock towee