fcn cusipCheckDigit(cusip){
   var [const] vs=[0..9].chain(["A".."Z"],T("*","@","#")).pump(String);
   try{
      sum:=Walker.cycle(1,2).zipWith(fcn(n,c){ v:=vs.index(c)*n; v/10 + v%10 },
           cusip[0,8]).reduce('+);
      ((10 - sum%10)%10 == cusip[8].toInt()) and cusip.len()==9
   }catch{ False }
}