{
  "sum": {
    "cat": {
      "pan": {
        "catpan": 42.32715826
      },
      "hat": {
        "cathat": 43.18440957
      },
      "dog": {
        "catdog": 39.24147285
      },
      "wye": {
        "catwye": 45.19677452
      },
      "cat": {
        "catcat": 37.89414848
      }
    },
    "pan": {
      "wye": {
        "panwye": 40.13529971
      },
      "pan": {
        "panpan": 36.22633427
      },
      "hat": {
        "panhat": 35.11586926
      },
      "dog": {
        "pandog": 37.81756019
      },
      "cat": {
        "pancat": 42.23567663
      }
    },
    "wye": {
      "cat": {
        "wyecat": 40.80572298
      },
      "hat": {
        "wyehat": 41.16669670
      },
      "dog": {
        "wyedog": 40.61954682
      },
      "wye": {
        "wyewye": 32.49097274
      },
      "pan": {
        "wyepan": 33.02719552
      }
    },
    "dog": {
      "hat": {
        "doghat": 43.51516221
      },
      "pan": {
        "dogpan": 45.61401108
      },
      "dog": {
        "dogdog": 43.54595570
      },
      "wye": {
        "dogwye": 37.22379467
      },
      "cat": {
        "dogcat": 45.64259510
      }
    },
    "hat": {
      "hat": {
        "hathat": 48.05889742
      },
      "wye": {
        "hatwye": 34.05426962
      },
      "pan": {
        "hatpan": 42.53875750
      },
      "cat": {
        "hatcat": 44.32565470
      },
      "dog": {
        "hatdog": 37.11424443
      }
    }
  }
}
a   b   ab     sum
cat pan catpan 42.32715826
cat hat cathat 43.18440957
cat dog catdog 39.24147285
cat wye catwye 45.19677452
cat cat catcat 37.89414848
pan wye panwye 40.13529971
pan pan panpan 36.22633427
pan hat panhat 35.11586926
pan dog pandog 37.81756019
pan cat pancat 42.23567663
wye cat wyecat 40.80572298
wye hat wyehat 41.16669670
wye dog wyedog 40.61954682
wye wye wyewye 32.49097274
wye pan wyepan 33.02719552
dog hat doghat 43.51516221
dog pan dogpan 45.61401108
dog dog dogdog 43.54595570
dog wye dogwye 37.22379467
dog cat dogcat 45.64259510
hat hat hathat 48.05889742
hat wye hatwye 34.05426962
hat pan hatpan 42.53875750
hat cat hatcat 44.32565470
hat dog hatdog 37.11424443
