Simplify CTC code
Simplify CTC code

anaruse/chainer,hvy/chainer,keisuke-umezawa/chainer,hvy/chainer,jnishi/chainer,hvy/chainer,ktnyt/chainer,okuta/chainer,tkerola/chainer,ktnyt/chainer,keisuke-umezawa/chainer,chainer/chainer,rezoo/chainer,niboshi/chainer,chainer/chainer,jnishi/chainer,keisuke-umezawa/chainer,chainer/chainer,wkentaro/chainer,chainer/chainer,pfnet/chainer,niboshi/chainer,niboshi/chainer,wkentaro/chainer,jnishi/chainer,jnishi/chainer,ktnyt/chainer,okuta/chainer,okuta/chainer,hvy/chainer,wkentaro/chainer,ktnyt/chainer,keisuke-umezawa/chainer,okuta/chainer,niboshi/chainer,aonotas/chainer,wkentaro/chainer,ronekko/chainer