1sub_fun_1_1 2TRAPPED 3sub_fun_1_2 4TRAPPED 5sub_fun_1_3 6TRAPPED 7sub_fun_1_4 8TRAPPED 9sub_fun_2_1 10TRAPPED 11sub_fun_2_2 12TRAPPED 13sub_fun_2_1 14TRAPPED 15TRAPPED 16sub_fun_2_2 17TRAPPED 18RETURNED 13 19