text: #include<stdio.h>
  int main()
  {
  	int i,j,n,a=0;
  	printf("no of life:");
  	scanf("%d",&n);
  	for(i=n;i>=1;i--)
  	{
  		for(j=1;j<=n-i;j++)
  		{
  			printf(" ");
  		}
  		for(j=1;j<=2*i-1;j++)
  		{
  			printf("%c",97+a++%26);
  		}
  		printf("\n");
  	}
  	return 0;
  }
  