//Half-Pyramid using Alphabets
 
#include<stdio.h>
int main()
{
	  int j=0; 
	  char alphabet='A',i='A',n;
      printf(" Please, Enter a Capital Letter (no small Letter) : ");
      scanf("%c",&n);
      while(i<='Z')  //checking, entered letter is capital.
      {
      	if(i==n)
      	{
    	 j=1;
      	 break;
      	}
      	else
      	 i++;
	  }
	  if(j==0)
	  {
	    printf("\n Wrong input Entered.");
	  	exit(0);
	  }  //Checking Ends here.
      for(i='A';i<=n;i++)  //Now, Printing time.
      {
         for(alphabet='A';alphabet<=i;alphabet++)
         {
            printf("%c ",alphabet);
         }
         printf("\n");
      }
      return 0;
}