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  1. list_a = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
  2. 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
  3. a = int(input())
  4. s = input()
  5. s = s.lower()
  6. c = 0
  7. for i in list_a:
  8. if i in s:
  9. c = c + 1
  10. if c == 26:
  11. print("YES")
  12. else:
  13. print("NO")
  14.  
  15.  
  16.  
Success #stdin #stdout 0.04s 9876KB
stdin
35
TheQuickBrownFoxJumpsOverTheLazyDog
stdout
YES