$VAR1 = {
          'root' => {
                      'A' => {
                               'D' => {
                                        'I' => ''
                                      },
                               'C' => {
                                        'H' => '',
                                        'G' => {
                                                 'K' => ''
                                               }
                                      }
                             },
                      'B' => {
                               'F' => '',
                               'E' => {
                                        'J' => ''
                                      }
                             }
                    }
        };
dist root <> A => 1
dist root <> C => 2
dist root <> G => 3
dist root <> K => 4
dist root <> H => 3
dist root <> D => 2
dist root <> I => 3
dist root <> B => 1
dist root <> E => 2
dist root <> J => 3
dist root <> F => 2
dist A <> C => 1
dist A <> G => 2
dist A <> K => 3
dist A <> H => 2
dist A <> D => 1
dist A <> I => 2
dist A <> B => 0
dist A <> E => 1
dist A <> J => 2
dist A <> F => 1
dist C <> G => 1
dist C <> K => 2
dist C <> H => 1
dist C <> D => 0
dist C <> I => 1
dist C <> B => 1
dist C <> E => 3
dist C <> J => 4
dist C <> F => 3
dist G <> K => 1
dist G <> H => 0
dist G <> D => 1
dist G <> I => 3
dist G <> B => 2
dist G <> E => 4
dist G <> J => 5
dist G <> F => 4
dist K <> H => 1
dist K <> D => 2
dist K <> I => 4
dist K <> B => 3
dist K <> E => 5
dist K <> J => 6
dist K <> F => 5
dist H <> D => 1
dist H <> I => 3
dist H <> B => 2
dist H <> E => 4
dist H <> J => 5
dist H <> F => 4
dist D <> I => 1
dist D <> B => 1
dist D <> E => 3
dist D <> J => 4
dist D <> F => 3
dist I <> B => 2
dist I <> E => 4
dist I <> J => 5
dist I <> F => 4
dist B <> E => 1
dist B <> J => 2
dist B <> F => 1
dist E <> J => 1
dist E <> F => 0
dist J <> F => 1