def p_sum_lvl_1(self, p):
if len(p) == <NUM_LIT:4>:<EOL><INDENT>p[<NUM_LIT:3>].append(p[<NUM_LIT:1>])<EOL>p[<NUM_LIT:0>] = p[<NUM_LIT:3>]<EOL><DEDENT>else:<EOL><INDENT>p[<NUM_LIT:0>] = [p[<NUM_LIT:1>]]<EOL><DEDENT>
sum_lvl_1 : script_lvl_1
                    |  script_lvl_1 PLUS sum_lvl_1