Identify the example of suffixes "s", "es" that usually bring about the plural meaning or make plural form?

Hint:

Suffix is a letter or group of letters added at the end of a word to make a new word or to change the word grammatically. If a word ends in ‘–s’, ‘–sh’, ‘–ch’, ‘–x’, or ‘–z’, you add ‘–es’. For almost all other words that do not end with ‘-s’, ‘-sh’, ‘-ch’, ‘-x’ or ‘-z’, add ‘–s’ to make it plural.