get_single_name
get_single_name(arts[i].source, art_user[i].source_device);
get_single_name(arts[i].target, art_user[i].target_device);
get_single_name(trts[i].source, trt_user[i].source_device);
get_single_name(trts[i].target, trt_user[i].target_device);
get_single_name(psvts[i].source, psvt_user[i].source_device);
get_single_name(psvts[i].target, psvt_user[i].target_device);