Which would be third in alphabetical order?

Alphabetical order is a system whereby character strings are placed in order based on the position of the characters in the conventional ordering of an alphabet.

It is one of the methods of collation. In mathematics, a lexicographical order is the generalization of the alphabetical order to other data types, such as sequences of digits or numbers.

When applied to strings or sequences that may contain digits, numbers or more elaborate types of elements, in addition to alphabetical characters, the alphabetical order is generally called a lexicographical order.