Steps: 3000	loss: 4.47142	acc: 0.20891	ppl: 87.48060	bleu: 1.36979	LR: 0.00016330	*
Steps: 4000	loss: 4.41991	acc: 0.23312	ppl: 83.08883	bleu: 1.63457	LR: 0.00014142	*