>>> s="Ahoj Karle."
>>> len(s)
11
>>> s[0]
'A'
>>> s[2]
'o'
>>> s[-1]
'.'
>>> s[-2]
'e'
>>> s[-3]
'l'
>>> s[1:3]
'ho'
>>> s[-4:-1]
'rle'
>>> novy=s[2:-2]
>>> novy
'oj Karl'
>>> abc=s[:]
>>> abc
'Ahoj Karle.'
