there are two
data base the first has some value (
Characters) and the seconed has some
Rules
the user insert the character and the rule then Compare the char then fire it and insert on the data base
like this example
fact represent the char
a,b,c,e
then the rule
a&b ---> r
c&r-->j
then Modified the first data base by inesrt the char r to it
and so on
--> this is mean arrow
& this is mean and opreation