less repetition in the regex, and a more nested structure
less repetition in the regex, and a more nested structure

lcorbasson/libphonenumber,lcorbasson/libphonenumber,google/libphonenumber,roes/libphonenumber,roes/libphonenumber,fishman1986/libphonenumber,fishman1986/libphonenumber,lcorbasson/libphonenumber,keghani/libphonenumber,fishman1986/libphonenumber,waveremit/libphonenumber,roes/libphonenumber,waveremit/libphonenumber,google/libphonenumber,keghani/libphonenumber,google/libphonenumber,waveremit/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber,waveremit/libphonenumber,waveremit/libphonenumber,lcorbasson/libphonenumber,roes/libphonenumber,keghani/libphonenumber,keghani/libphonenumber,fishman1986/libphonenumber,lcorbasson/libphonenumber,roes/libphonenumber,fishman1986/libphonenumber,keghani/libphonenumber