Slicing with python on a single line

I have data "line"

FF= ['123451234512345678901234512345', '123451234512345678901234512345']

I need to slice line 1-5, 6-10开发者_开发问答, 11, 12-22. How do I slice?

data= [] 

for col in FF:
    data.append(col)

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Something like:

a = [(s[:5], s[5:10], s[10], s[11:]) for s in FF]

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With struct.

>>> struct.unpack('5s5sc11s8x', '123451234512345678901234512345')
('12345', '12345', '1', '23456789012')