+ case LPP_CMD_BAD: return "BAD";
+ case LPP_CMD_OK: return "OK";
+ case LPP_CMD_PROBLEM: return "PROBLEM";
+ case LPP_CMD_SOLUTION: return "SOLUTION";
+ case LPP_CMD_SOLVER: return "SOLVER";
+ case LPP_CMD_BYE: return "BYE";
+ case LPP_CMD_SOLVERS: return "SOLVERS";
+ case LPP_CMD_SET_DEBUG: return "SET_DEBUG";
+ case LPP_CMD_INFO: return "INFO";
+ case LPP_CMD_LAST:
+ break;