Regex for UK phones (without +)

Regex for Irish phones (without +)

Regex for Swedish phones (without +)

Regex for Indian phones (without +)

Regex for Indonesian phones (without +)

Regex for Japanese phones (without +)

Regex for Emirati phones (without +)

Regex for USA and Canadian phones (without +)

Regex for Peruvian phones (without +)

Regex for Venezuelan phones (without +)

Regex for Brazilian phones (without +)

Regex for Colombian phones (without +)

Regex for Ecuadorian phones (without +)

Regex for Bolivian phones (without +)

Regex for Mexican phones (without +)

Regex for Chilean phones (without +)

Regex for Argentinian phones (without +)

Trova la stringa corrispondente ad un codice fiscale italiano

test

This finds a letter and omits all other instances of that letter, leaving you only the distinct letters used in the string.