#include <iostream>
using namespace std;

short numA, numB, numC, numD;
char input;

void readChar()
{
    input = cin.get();
}

int main()
{
    cout << "Enter a group of grades: ";

    _asm
    {
    START:
        call readChar;

        // if A
        cmp input, 'A';
        Je COUNTA;
        cmp input, 'a';
        Je COUNTA;

        // if B
        cmp input, 'B';
        Je COUNTB;
        cmp input, 'b';
        Je COUNTB;

        // if C
        cmp input, 'C';
        Je COUNTC;
        cmp input, 'c';
        Je COUNTC;

        // if D
        cmp input, 'D';
        Je COUNTD;
        cmp input, 'd';
        Je COUNTD;

        // if end
        Jmp END;

    COUNTA:
        mov ax, numA;
        inc ax;
        mov numA, ax;
        Jmp START;

    COUNTB:
        mov ax, numB;
        inc ax;
        mov numB, ax;
        Jmp START;

    COUNTC:
        mov ax, numC;
        inc ax;
        mov numC, ax;
        Jmp START;

    COUNTD:
        mov ax, numD;
        inc ax;
        mov numD, ax;
        Jmp START;

    END:
    }
    cout << "No. of A's = " << numA << endl;
    cout << "No. of B's = " << numB << endl;
    cout << "No. of C's = " << numC << endl;
    cout << "No. of D's = " << numD << endl;

    system("PAUSE");
    return 0;
}