1_C_ctype_ 2_C_tolower_ 3_C_toupper_ 4_ZSt7nothrow 5__isthreaded 6__libc_malloc_dispatch 7__p_class_syms 8__p_type_syms 9__progname 10__sF 11__stack_chk_guard 12__system_property_area__ 13_ctype_ 14_tolower_tab_ 15_toupper_tab_ 16daylight 17environ 18optarg 19opterr 20optind 21optopt 22optreset 23sys_siglist 24sys_signame 25timezone 26tzname 27