When I studied Economics in college, we were hundreds of students.
We were divided into a few large groups (series A, B, C, and D – for courses) and, within those big series, there were smaller groups for seminars (groups 1, 2, etc.).
The great thing, which I really liked – we were divided in such a way that in almost all groups there was a person whose name started with A/B, another one with C/D, and so on.
We weren’t, in a small group, all students with names like Ana, Anca, Alin – we had Ana, Denisa, Matei and so on.
I am saying this because I knew some students who were studying at other faculties, and, in there, they were split into groups in which everyone’s names started with the same letter.
Imagine the problem of remembering 20 colleagues whose names start with the same letter, and, for the teachers, remembering students’ names.