+ check_ascii(mt, leader, 5, 'a');
+ check_ascii(mt, leader, 6, 'a');
+ check_ascii(mt, leader, 7, 'a');
+ check_ascii(mt, leader, 8, '#');
+ check_ascii(mt, leader, 9, '#');
+ if (!atoi_n_check(leader+10, 1, indicator_length) || *indicator_length == 0)