private double[] charToDouble(char[] responses){
        int n = responses.length;
        double[] converted = new double[n];
        for(int i=0; i<n; i++){
            double holdi = (double)((int)responses[i]);
            if(holdi>96.0){
                converted[i] = holdi-96.0;
            }
            else{
                converted[i] = holdi-64.0;
            }
        }     
        return converted;
    }