@groups = (
            [
              '1200',
              '1300',
              '1000',
              '1100',
              '1500',
              '1700',
              '2000',
              '2100',
              '3000'
            ],
            [
              '1200',
              '2100',
              '1500',
              '1700'
            ],
            [
              '1200',
              '1700'
            ],
            [
              '1200'
            ]
          );