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  1. s = input()
  2. n = len(s)
  3. print(s[0:4])
  4. print(s[n//2-1:n//2+2])
  5. print(s[::5])
  6. print(s[4::5])
  7.  
  8. print("========")
  9.  
  10. s = input()
  11. n = len(s)
  12. print(s[0:4])
  13. print(s[n//2-1:n//2+2])
  14. print(s[::5])
  15. print(s[4::5])
Success #stdin #stdout 0.02s 9160KB
stdin
123456789012345
1234567890123456
stdout
1234
789
161
505
========
1234
890
1616
505