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

Q: Sentence: 'a table full of various types of cellphones, pdas and pagers'. Replace the letter 's' with 'f' in the sentence.

A: a table full of variouf typef of cellphonef, pdaf and pagerf
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Q: Sentence: 'a gray elephant standing next to green bushes'. Replace the letter 'e' with 'o' in the sentence.

A: a gray olophant standing noxt to groon bushos
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Q: Sentence: 'a dog standing at a gate wanting to get out of the fence'. Replace the letter 'a' with 'f' in the sentence.

A:
f dog stfnding ft f gfte wfnting to get out of the fence
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