Contingency items:
1 <0.000, 108.000>
2 <72.000, 36.000>
3 <72.000, 36.000>
4 <72.000, 36.000>

Contingency keys:  ['1', '2', '3', '4']
Contingency values:  [<0.000, 108.000>, <72.000, 36.000>, <72.000, 36.000>, <72.000, 36.000>]
Contingency items:  [('1', <0.000, 108.000>), ('2', <72.000, 36.000>), ('3', <72.000, 36.000>), ('4', <72.000, 36.000>)]

cont[0] = <0.000, 108.000>
cont["1"] = <0.000, 108.000>
cont[orange.Value(data.domain["e"], "1")] = <0.000, 108.000>

Iteration through contingency:
<0.000, 108.000>
<72.000, 36.000>
<72.000, 36.000>
<72.000, 36.000>

Contingency items after normalization:
1 <0.000, 1.000>
2 <0.667, 0.333>
3 <0.667, 0.333>
4 <0.667, 0.333>

