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BÀI TẬP :   91

1. def HCN(d,r):
2.       for i in range(0,d):
3.               print(“*”,end=””,sep=””)
4.       print()
5.       for i in range(0,r-2):
6.               print(“*”,” “*(d-2),”*”,sep=””)
7.       for i in range(0,d):
8.               print(“*”,end=””,sep=””)
9. #
10. d,r=map(int,input().split())
11. HCN(d,r)