Braille
Sometimes, part of words are contracted, and a character can mean different things in different parts of a word. There are many rules for this process. For example, the character with dots 2-3-5 (the letter "f" lowered in the braille cell) stands for "ff" when used in the middle of a word.  At the beginning of a word, this same character stands for the word "to" although the character is written in braille with no space following it.  At the end of a word, the same character represents an exclamation point.