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

Sentence: 'a baseball player holding a baseball bat during a baseball game'. Replace the letter 'a' with 'u' in the sentence.
u busebull pluyer holding u busebull but during u busebull gume

Sentence: 'a safari setting at a zoo with two giraffes and a zebra'. Replace the letter 'n' with 'g' in the sentence.
a safari settigg at a zoo with two giraffes agd a zebra

Sentence: 'a teenager is doing tricks on his skateboard'. Replace the letter 't' with 'x' in the sentence.

a xeenager is doing xricks on his skaxeboard