wildcard "+" and "!"
i've a little doubt..what is the exact difference beetween those kind of wildcard?
for example with a given RP of 91! or 91X+
in the case of 91! it can match one or more digits from 0 to 9 and it's clear but in the case of 91X+ what exact digit it matches?
maybe 911111 or 912222 or 9133 or 914444444 ? right ?