Add to this code the numbering of all group_list values from 1 dct = convert_to_dict(students) def group_list(dct, gr): group_list = [] for k, v in dct.items(): if gr in v: group_list.append(' '.join(dct[k][0:3])) group_list.sort() return group_list group_list(dct, 'BST161')

def group_list(dct, gr):
    group_list = []
    for k, v in dct.items():
        if gr in v:
            group_list.append(' '.join(dct[k][0:3]))
            group_list.sort()
    for i, n in enumerate(group_list):
        print('{}. {}'.format(i+1, n))
group_list(dct, 'BST161')
# output
1. A. García de Leon
2. A. Martínez Martínez
3. A. Romero de la Fuente
4. C. Ramírez de Cartagena
5. E. González Gómez
6. F. García León
7. H. Solís Ortíz
8. J. Carlos
9. J. Fernández
10. J. Muñoz Solís
11. L. González Gómez