The correct snippet is:

alias /ra1 {
set %rainbow $1-
%rainbow = $replace(%rainbow,a,2a,b,3b,c,4c,d,5d,e,6e,f,7f,g,8g,h,9h,i,10i,j,11j,k,12k,l,13l,m,14m,n,15n,o,2o,p,3p,q,4q,r,5r,s,6s,t,7t,u,8u,v,9v,w,10w,x,11x,y,12y,z,13z,=,14=,?,2?,!,3!,\",4\",,5,$,6$,%,7%,^,8^,&,9&,,10,$chr(40),11 $+ $chr(40),$chr(41),13 $+ $chr(41),-,3-,,4,=,5=,+,6+)
say %rainbow
unset %rainbow
}

alias /ascii {
set %ascii $1-
%ascii = $replace(%ascii,a,b,c,,d,e,f,f,g,g,h,h,i,j,j,k,K,l,,m,m,n,o,p,,q,q,r,,s,,t,t,u,v,V,w,w,x,y,,z,z,?,,!,,1/4,,1/2,,3/4,,ae,1,,2,,3,)
say %ascii
unset %ascii
}

I recommend changing the: alias /ascii {
to: alias /ra2 {

or something like that because some scripts have the /ascii with other function... You\'ll have 2functions for the command...