#include <reg52.h>
#include <stdio.h>
#define bool char

typedef enum
{
  N=0,U, D, L, R
} MOVE_STATE;


struct DOT
{
  unsigned char x;
  unsigned char y;
} ;

struct BODY
{

  dot d;
  MOVE_STATE ms;
  char id;
};

typedef struct BODY Body;
typedef struct DOT Dot;