# Codeblock 3 Output
original     : torch.Size([1, 64, 56, 56])
after conv0  : torch.Size([1, 48, 56, 56])    #(1)
after conv1  : torch.Size([1, 12, 56, 56])    #(2)
after concat : torch.Size([1, 76, 56, 56])