#include<iostream>
#include<math.h>
using namespace std;
class compozytor{
                private:
                int le;
                const int freq;
                enum notes {
                A=440,
                B=493.883,
                C=523.251,
                D=587.33,
                E=659.255,
                F=698.456,
                G=783.991,
                H=880
                }
                double hz, lo, hi;
                const double a, d, s, r;
                double sinus(float i, float l){
                        return sin(i*2.0*M_PI*hz/freq);
                }
                int v;
                public:
                double adsr(float i, float l){
                        v=i/l;
                        if (v<a)
                                return sinus(i)*i/(a*l);
                        else if (v<d)
                                return sinus(i);
                        else if (v<s)
                                return sinus(i);
                        else
                                return sinus(i)*(l-i)/(r*l);
                }
                compozytor():freq(44100),a(0.2), d(0), s(0), r(1.0-a-d-s){
                        notes akcja;
                        ostream out;
                }
                virtual void graj(){
                        char znak[4];
                        int liczba;
                        for(int kapusta; ;++kapusta){
                                cin>>znak;
                                if(znak=="end"){
                                        break;
                                }