fixing sorting logic for populating automation controller

[IPvSean]

i know what the problem is! in my code
if i got a bunch of workbenches

student_hosts:
  - "dec18-workshop-provision-satellite-student1-node1"
  - "dec18-workshop-provision-satellite-student1-node2"
  - "dec18-workshop-provision-satellite-student1-node3"
  - "dec18-workshop-provision-satellite-student2-node1"
  - "dec18-workshop-provision-satellite-student2-node2"
  - "dec18-workshop-provision-satellite-student2-node3"
  - "dec18-workshop-provision-satellite-student11-node3"
  - "dec18-workshop-provision-satellite-student11-node3"
  - "dec18-workshop-provision-satellite-student11-node3"

student_number: 1

i would filter through the giant list of inventory
to sort them “per workbench”

- name: Filter hosts containing student number
  ansible.builtin.set_fact:
    student_hosts: "{{ groups['rhel'] | select('search', student_number ~ '-') | list }}"
    control_nodes: "{{ groups['control_nodes'] | select('search', student_number ~ '-') | list }}"
    satellite_nodes: "{{ groups['satellite'] | select('search', student_number ~ '-') | list }}"

but this will return student1 AND student11 AND student21 and so on and so forth

if i was just looking for student1
the fix should be

new_hosts: "{{ student_hosts | select('search', 'student' ~ student_number ~ '-') | list }}"