The lexicographic order is used in mathematics to order alphabetical strings based on the order assigned to the alphabet, this is mainly used in dictionaries and encyclopedias, but it has many other applications, including computer science.
Thus, in the same way that the word as and the word "net" goes before in a dictionary that the word "ten", in lexicographic order "RST" will have less value than "STR"
Answer
False, in the lexicographic order, "rst" does not appear the same as "str".