{
  "sum": {
    "cat": {
      "pan": 42.32715826,
      "hat": 43.18440957,
      "dog": 39.24147285,
      "wye": 45.19677452,
      "cat": 37.89414848
    },
    "pan": {
      "wye": 40.13529971,
      "pan": 36.22633427,
      "hat": 35.11586926,
      "dog": 37.81756019,
      "cat": 42.23567663
    },
    "wye": {
      "cat": 40.80572298,
      "hat": 41.16669670,
      "dog": 40.61954682,
      "wye": 32.49097274,
      "pan": 33.02719552
    },
    "dog": {
      "hat": 43.51516221,
      "pan": 45.61401108,
      "dog": 43.54595570,
      "wye": 37.22379467,
      "cat": 45.64259510
    },
    "hat": {
      "hat": 48.05889742,
      "wye": 34.05426962,
      "pan": 42.53875750,
      "cat": 44.32565470,
      "dog": 37.11424443
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  }
}
a   b   sum
cat pan 42.32715826
cat hat 43.18440957
cat dog 39.24147285
cat wye 45.19677452
cat cat 37.89414848
pan wye 40.13529971
pan pan 36.22633427
pan hat 35.11586926
pan dog 37.81756019
pan cat 42.23567663
wye cat 40.80572298
wye hat 41.16669670
wye dog 40.61954682
wye wye 32.49097274
wye pan 33.02719552
dog hat 43.51516221
dog pan 45.61401108
dog dog 43.54595570
dog wye 37.22379467
dog cat 45.64259510
hat hat 48.05889742
hat wye 34.05426962
hat pan 42.53875750
hat cat 44.32565470
hat dog 37.11424443
