A lexical analyzer uses the following token definitions • $letter \rightarrow [A - Z a - z]$ • $digit \rightarrow [0 - 9]$ • $id \rightarrow letter \text{ } (letter \mid digit)*$ • $number \rightarrow digit^+$ • $ws \rightarrow (blank \mid tab \mid newline)^+$ For the string given below, $$x1\ \ 23mm\ 78\ y\ 7z\ zz5\ 14A\ 8H\ AaYcD$$ the number of tokens (excluding ws) that will be produced by the lexical analyzer is __________. (answer in integer)

A lexical analyzer breaks an input stream into tokens using the Longest Match (Maximal Munch) rule:

Analyzing each segment of the input string separated by whitespace (ws):

1. x1 $\rightarrow$ Starts with a letter, consumes x1 as id (1 token).

2. 23mm $\rightarrow$ Starts with digits, maximal match for number is 23 (1 token). The remaining mm starts with a letter, matching id (1 token) $\implies 2$ tokens.

3. 78 $\rightarrow$ Matches number (1 token).

4. y $\rightarrow$ Matches id (1 token).

5. 7z$\rightarrow$7 matches number (1 token), z matches id (1 token) $\implies 2$ tokens.

6. zz5 $\rightarrow$ Starts with a letter, matches id (1 token).

7. 14A$\rightarrow$14 matches number (1 token), A matches id (1 token) $\implies 2$ tokens.

8. 8H$\rightarrow$8 matches number (1 token), H matches id (1 token) $\implies 2$ tokens.

9. AaYcD $\rightarrow$ Matches id (1 token).

Total count of tokens (excluding whitespace):

Thus, the total number of tokens produced is 13.