===== String input output =====

^ [[ACCEPT]]   |( c-addr +n1 --- +n2 )|
^ [[BL]]       |( --- char )|
^ [[CR]]       |( --- )|
^ [[EMIT]]     |( x --- )|
^ [[KEY]]      |( --- char )|
^ [[SPACE]]    |( --- )|
^ [[SPACES]]   |( n --- )|
^ [[TYPE]]     |( c-addr u --- )|