Nested list comprehension equivalent
<p>Is it possible to replace the following code with a list comprehension expression?</p>

<pre><code>input = ['1\t2,3\t4,5', '61\t7,8\t9,0']

res = []
li = [i.split() for i in input]
for i in li:
    l = [i[0]]
    l = l + [e.split(',') for e in i[1:]]
    res.append(l)
</code></pre>

<p>The problem is that the first element in every sublist should be treated differently than the rest of the elements.</p>
