In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a giraffe walking in its natural habitat on the savannah'. Replace the letter 't' with 'u' in the sentence.

Answer: a giraffe walking in ius nauural habiuau on uhe savannah


Question: Sentence: 'a fire hydrant with a message painted on it'. Replace the letter 'n' with 'j' in the sentence.

Answer: a fire hydrajt with a message paijted oj it


Question: Sentence: 'a red toothbrush with toothpaste over a sink'. Replace the letter 'h' with 'd' in the sentence.

Answer:
a red tootdbrusd witd tootdpaste over a sink