['diabetes', 'diabetes mellitus, type 1']
['faster-acting insulin aspart', 'insulin aspart']

        Inclusion Criteria:

          -  Male or female aged 18-64 years (both inclusive) at the time of signing informed
             consent

          -  Subjects diagnosed (clinically) with type 1 diabetes mellitus at least 365 days prior
             to the day of screening

          -  Body mass index 18.5-28.0 kg/m^2 (both inclusive)

        Exclusion Criteria:

          -  Smoker (defined as a subject who is smoking at least five cigarettes or the equivalent
             per day) who is not able or willing to refrain from smoking or use of nicotine gum or
             transdermal nicotine patches during the inpatient period

          -  Subject who has donated any blood or plasma in the past month or more than 500 mL
             within 3 months prior to screening
      