#define OP_ADD 257
#define ADD 258
#define OP_SUB 259
#define SUB 260
#define OP_MUL 261
#define MUL 262
#define OP_DIV 263
#define DIV 264
#define OP_MOD 265
#define MOD 266
#define OP_AND 267
#define AND 268
#define DIGIT 269
#define LETTER 270
#define UMINUS 271