#include <stdio.h>


bool analyze(unsigned char *data, int len)
{
  static unsigned long scanner = 0xffffffff;
  
  int o = 6 + 3 + data[ 6 + 2 ];
  int n = 0;
  
  for (int i = o; i < len; i++)
  {
    scanner <<= 8;
    scanner |= data[ i ];

    if (scanner == 0x00000100)
    {
//      fprintf(stderr, ".");
      
      n++;
      if (n > 1)
        return false;
    }
  }

  return true;
}

int main()
{
  long long p = 0;
  
  unsigned char buf[ 4096 ];
  
  while (true)
  {
    int r = fread(buf, 1, 6, stdin);
    p += r;
    if (r != 6)
    {
      if (r == 0)
        return 0;
      
      fprintf(stderr, "error 1 at: 0x%llx\n", p);
      return 1;
    }

    if (buf[ 0 ] != 0x00
        || buf[ 1 ] != 0x00
        || buf[ 2 ] != 0x01)
    {
      fprintf(stderr, "error 2 at: 0x%llx\n", p);
      return 2;
    }

    int l = buf[ 4 ] * 256 + buf[ 5 ];
    if (l > (2048 - 6))
    {
      fprintf(stderr, "error 3 at: 0x%llx\n", p);
      return 3;
    }

    r = fread(buf + 6, 1, l, stdin);
    p += r;
    if (r != l)
    {
      fprintf(stderr, "error 4 at: 0x%llx\n", p);
      return 4;
    }

    if (((buf[ 3 ] & 0xf0) == 0xe0)
      && !analyze(buf, 6 + l))
    {
      fprintf(stderr, "error 5 at: 0x%llx\n", p);
      return 5;
    }
  }
}