Twenty-three handlers. Code $0D, a new line, is printed by the same routine as a literal character, and four codes share the one at MC_NOTHING -- which is the XOR A; RET that ends code $02's own handler. Codes $02 and $0B are the only ones that take a byte after them. The codes that print a name, IS or ARE, and HIS or YOUR are what let one message serve the whole cast: the same bytes print YOU ARE NOT CARRYING IT for the player and GANDALF IS NOT CARRYING IT for Gandalf.