string
string bang 1564687
string clisten 1679813
string value range is 0-9 repeatable
how to judge that three strings exist at the same time
string
string bang 1564687
string clisten 1679813
string value range is 0-9 repeatable
how to judge that three strings exist at the same time
three string conversions are combined to find the intersection
a = '6171156'
b = '1564687'
c = '1679813'
set(a) & set(b) & set(c)
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