Subjects completing @weeks ( @-week main trial BEGIN ONCE-LONG + @-week extension ) on insulin degludec ( IDeg ) OD + metformin with HbA@c@ @ % ( @mmol/mol ) were randomized to IDeg + Lira -LSB- n = @ , mean HbA@c : @ % ( @mmol/mol ) -RSB- or IDeg + IAsp ( n = @ , mean HbA@c : @ % ) for @weeks , continuing metformin .