import re
st3 = ("Operational.1252.Devi\n"
"Staff.1875.Erin\n"
"Operational.1552.Dave\n"
"Staff.1875.Hutri\n"
"Operational.1952.Liana\n"
"Management.1292.Ricky\n"
"Staff.1875.Udin\n"
"Management.1852.Oswyne\n"
"Staff.1875.Udin\n"
"Operational.1052.Devi\n"
"Management.1282.Putra\n"
"Operational.1262.Kelvin\n"
"Admin.9823.Gilang\n"
"Staff.1275.Siska\n"
"Staff.1835.Udin\n"
"Admin.9823.Gilang\n"
"Staff.1875.Silalahi\n"
"Management.1282.Delvin\n"
"and more List....")
pattern = r"^(?:Operational|Management|Admin|Staff)\.[0-9]{1,4}(\..+)"
result = sorted(set(re.findall(pattern, st3, re.M)))
print(result)
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
['.Dave', '.Delvin', '.Devi', '.Erin', '.Gilang', '.Hutri', '.Kelvin', '.Liana', '.Oswyne', '.Putra', '.Ricky', '.Silalahi', '.Siska', '.Udin']