Hi Trung, I am trying to implement your code, but there is one line I couldn't understand. In the RNN_utils.py, Line 38 and Line 45. I think "X[i] = input_sequence" should be executed after the whole loop of “for j in range(seq_length)” is finished. In other words, "X[i] = input_sequence" should not be included inside the "for" loop. So does y[i] in Line 45. Is my understanding right? Thanks.