Fortune Telling Collection - Free divination - What is the word minus one?

What is the word minus one?

Multi-input method (multi-Chinese character and graphic symbol input method) You can see the word?by entering tss. This is the GBK character set, which can be displayed on a computer. This is a rare word, which is not included in general dictionaries.

Online query shows that "Shang" and "Shang" are homonyms.