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

Input: Consider Input: Sentence: 'a basket holds flowers, twigs, and various fruits'. Replace the letter 'a' with 'g' in the sentence.

Output: g bgsket holds flowers, twigs, gnd vgrious fruits

Input: Consider Input: Sentence: 'a girl sitting in a chair eating a slice of pizza'. Replace the letter 'i' with 'x' in the sentence.

Output: a gxrl sxttxng xn a chaxr eatxng a slxce of pxzza

Input: Consider Input: Sentence: 'the outdoor bench is surrounded by trees, flowers, and other greenery'. Replace the letter 'i' with 'l' in the sentence.
Output: the outdoor bench ls surrounded by trees, flowers, and other greenery