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

Input: Consider Input: Sentence: 'horses drink and graze the field and water'. Replace the letter 'i' with 'c' in the sentence.

Output: horses drcnk and graze the fceld and water


Input: Consider Input: Sentence: 'a person flying a kite on the beach  between some trees'. Replace the letter 's' with 'k' in the sentence.

Output: a perkon flying a kite on the beach  between kome treek


Input: Consider Input: Sentence: 'a square clock and several signs hang at a train station'. Replace the letter 'i' with 'c' in the sentence.


Output: a square clock and several scgns hang at a tracn statcon