<tt>
Previous font to the characters of a family: Fb
</tt>

<ms>
- Instruction: Fb"%"
- Parameter: "%" font name
- Return: true if the font before the sequence of characters of the same family is %

- Description:
Returns true if the font before the character family where the index is located is the one specified. Character family means characters belonging to the family of letters, numbers, punctuation, spaces, or other characters. The character family is established using the first character in the string.

- Examples

Text string: a
Braille string: 456
Condition: Fb "arial
Description: Returns true if before the letter "a", and all other letters that precede it, the font name begins with "arial".

Text string: 5
Braille string: 26
Condition: Fb "Arial"
Description: Returns true if before the number "5", and all other numbers preceding it, there is exactly the font "Arial".
</ms>

<rl>
</rl>

<ck>
004NC4W6OU7PF8
</ck>

<in>

</in>
