epoch: 1 valid swapped pairs: 1735/4950
epoch: 2 valid swapped pairs: 1194/4950
epoch: 3 valid swapped pairs: 885/4950
epoch: 4 valid swapped pairs: 589/4950
epoch: 5 valid swapped pairs: 453/4950
epoch: 6 valid swapped pairs: 350/4950
epoch: 7 valid swapped pairs: 295/4950
epoch: 8 valid swapped pairs: 249/4950
epoch: 9 valid swapped pairs: 226/4950
epoch: 10 valid swapped pairs: 204/4950