6 6 ## unordered bitrades of size 12 abcdef badcfe badcfe abcdef `````` `````` `````` `````` `````` `````` `````` `````` abcdef badefc badefc abcdef `````` `````` `````` `````` `````` `````` `````` `````` abcdef bcaefd bcaefd abcdef `````` `````` `````` `````` `````` `````` `````` `````` abcdef bcdefa bcdefa abcdef `````` `````` `````` `````` `````` `````` `````` `````` abcdef badcfe badc`` abcd`` ````fe ````ef `````` `````` `````` `````` `````` `````` abcdef bcdafe bcda`` abcd`` ````fe ````ef `````` `````` `````` `````` `````` `````` abcdef bcaefd bca``` abc``` ```efd ```def `````` `````` `````` `````` `````` `````` abcdef badcfe ba```` ab```` ``dc`` ``cd`` ````fe ````ef `````` `````` `````` `````` abcde` badec` fadec` afcde` bf```` fb```` `````` `````` `````` `````` `````` `````` abcde` bcaed` fcaed` afcde` bf```` fb```` `````` `````` `````` `````` `````` `````` abcde` bcdea` fcdea` afcde` bf```` fb```` `````` `````` `````` `````` `````` `````` abcde` cdaeb` cdaeb` bacde` ba```` 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``cd`` ````ef ````fe ````fe ````ef Generated 131 bitrades from 166 A complete list.