12. An information processing device comprising: a communicator configured to communicate with a printer; a controller; and storage storing a program; the controller reading the program from the storage and executing steps including: receiving print information from the printer, the print information being text data written as text; deconstructing the text data and generating multiple words; acquiring keyword information identifying a keyword, and relation information identifying a relationship between the keyword information and a word to detect; and detecting from the multiple words, based on the keyword information and the relation information, the word to detect.
12. An information processing device comprising: a communicator configured to communicate with a printer; a controller; and storage storing a program; the controller reading the program from the storage and executing steps including: receiving print information from the printer, the print information being text data written as text; deconstructing the text data and generating multiple words; acquiring keyword information identifying a keyword, and relation information identifying a relationship between the keyword information and a word to detect; and detecting from the multiple words, based on the keyword information and the relation information, the word to detect. 17. The information processing device described in claim 12 , wherein: the print information is printed by the printer as a receipt.