void genpattern(int size)
{
	char temp = 'A';
	int incr;
	for(int i=0;i<size/2+1;i++)
	{
		incr=1;
		for(int j=size/2+1;j>1;j--)
		{

			if(j<=i)
			{
				cout<<" ";
				continue;
			}
			cout<<temp;
			temp += incr;
		}
		if(i==0)
			cout<<temp;
		else
			cout<<" ";
		temp -= 1;
		incr = -1;
		for(j=size/2+1;j>1;j--)
		{
			if(j<=i)
			{
				cout<<" ";
				continue;
			}
			cout<<temp;
			temp += incr;
		}
		cout<<endl;
		temp = 'A';

	}
}