void printchar(char znak, char x, char y);
void setmod(char mod);
unsigned char readchar();

unsigned char readchar()
{
  unsigned char znak1,znak2,znak;
  asm {
  mov ah,0x0;
  int 0x16;
  mov znak,al;
  }
  return znak;
}

void setmod(char mod)
{
  asm {
  mov ah,0;
  mov al,mod[0];
  int 0x10;
  }
}

void printchar(char znak, char x, char y)
{
 asm {
   mov ah,0x2;
   mov bh,0;
   mov dh,x;
   mov dl,y;
   int 0x10;

   mov ah,0xa;
   mov al,znak;
   mov cx,1;
   int 0x10;
 }
}


void main()
{
  unsigned char dummy;
  int temp;
  setmod(3);
  do {
    dummy=readchar();
    temp =(dummy % 10)+40;
    printchar(temp,1,2);
    temp =dummy / 10;
    temp =(temp % 10)+40;
    printchar(temp,1,1);
  } while (dummy!=27);

}