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  1. n = int(input())
  2.  
  3. for i in range(n):
  4. for j in range(i, -1, -1):
  5. print(chr(65+n-j-1), end=" ")
  6. print()
Success #stdin #stdout 0.02s 9292KB
stdin
5
stdout
E 
D E 
C D E 
B C D E 
A B C D E