给定一篇英文文章和一个单词，生成一个新的文章，其中单词的每个实例都被替换为其在字母表中下一个字母的单词。输出替换后的新文章。
文章：Shakespeare was an English playwright, poet, and actor, widely regarded as the greatest writer in the English language.
单词：English
Shakespeare was an English qmfbhvuj, qfou, and bdujp, xjmmjoh sbe hfdbtfdu bs uif hsbtt boe mfbso, xjmmjoh sfbet bshfou bstf xjuipvu jo uif Fntqbujpo mbohvbhf.