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

Sentence: 'a little girl is sitting in a suitcase in a library'. Replace the letter 't' with 'l' in the sentence.
a lillle girl is silling in a suilcase in a library

Sentence: 'the living room is designed with brown and beige colors'. Replace the letter 'i' with 'b' in the sentence.
the lbvbng room bs desbgned wbth brown and bebge colors

Sentence: 'a big building with a clock tower on it'. Replace the letter 'r' with 'b' in the sentence.
a big building with a clock toweb on it