Problem

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slices

Theory Click to read/hide

Line slices

In Python, you can select part of a string (substring). To do this, use the operation of obtaining a slice (from the English slicing)
The general view of the slicing operation is as follows 
s[start:stop:step]
This command takes a slice from the string s starting from the character at index start up to the character at index stop (not including it) with step step (if not specified, step is 1)
Any part in brackets may be missing.
For example, 
s1 = s[3:8]
means that characters from 3 to 7 are copied into string s1 from string s with step 1.
You can take negative indices, then the count is from the end of the string. 
s = "0123456789"
s1 = s[-7:-2] # s1="34567"
If start is not specified, it is considered to be equal to zero (that is, we take it from the beginning of the string). If stop is not specified, then the slice is taken until the end of the string. 
s = "0123456789"
s1 = s[:4] # s1="0123"
s2 = s[-4:] # s2="6789"
This is how easy it is to reverse a string: 
s = "0123456789"
s1 = s[::-1] # s1="9876543210"
All characters of the string are iterated in increments of -1, which means that the characters will be iterated from the end. The entire row is involved because the start and end indexes are not specified.

Problem

When solving a problem, use slices.

Input
Given a string.

Imprint
Display: 
  • first the third character of this line;
  • in the second line, the penultimate character of this line;
  • in the third line, the first five characters of this line;
  • on the fourth line, the entire line except for the last two characters;
  • in the fifth line, all characters with even indices (assuming that indexing starts from 0, so the characters are displayed starting from the first);
  • in the sixth line, all characters with odd indices, i.e. starting from the second character of the line;
  • in the seventh line, all characters are reversed;
  • in the eighth line, all the characters of the line through one in reverse order, starting from the last;
  • in the ninth line, the length of this line.
 
Examples
# Input Output
1 Abrakadabra r
r
Abrak
Abrakadab
Arkdba
baar
arbadakarbA
abdkrA
11

time 1000 ms
memory 256 Mb
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