(try_begin),
(is_between, ":cur_troop", "trp_knight_1_1", "trp_knight_2_1"),
(store_sub, ":npc_seed", ":cur_troop", "trp_knight_1_1"),
(assign, ":ancestor_seed", 1),
(else_try),
(is_between, ":cur_troop", "trp_knight_2_1", "trp_knight_3_1"),
(store_sub, ":npc_seed", ":cur_troop", "trp_knight_2_1"),
(assign, ":ancestor_seed", 7),
(else_try),
(is_between, ":cur_troop", "trp_knight_3_1", "trp_knight_4_1"),
(store_sub, ":npc_seed", ":cur_troop", "trp_knight_3_1"),
(assign, ":ancestor_seed", 13),
(else_try),
(is_between, ":cur_troop", "trp_knight_4_1", "trp_knight_5_1"),
(store_sub, ":npc_seed", ":cur_troop", "trp_knight_4_1"),
(assign, ":ancestor_seed", 19),