u = v v = r r = n n = m

BUT:

u =/= r,m (it can be n sometimes) v =/= n,m r =/= m,u n =/= v (it can be u sometimes)

I am not saying “the simbols look somewhat similar with enough mental gymnastics”. I’m saying that they are so similar that it’s very understandable to use one instead of the other by accident in almost any context