NTH load balancing

Hello, I greet and I tell them I doubt that is the nth, the following specific rules:

/ ip firewall mangle
add action = mark-packet chain = prerouting new-packet-mark = AAA nth = 3.1 passthrough = yes;
add action = mark-packet chain = prerouting new-packet-mark = BBB nth = 3.2 passthrough = yes;
add action = mark-packet chain = prerouting new-packet-mark = CCC nth = 3.3 passthrough = yes;

Will the question: The first rule of every 3 packs marks the first? Is the second rule, in three packages mark the second? Is the third rule, in three packages mark the third?

yes, if you have five packets passing ‘prerouting’ chain, they will have ‘AAA, BBB, CCC, AAA, BBB’ routing marks accordingly

p.s. not ‘3.1’, but ‘3,1’ - use commas

thanks