text: #include <stdio.h>
  
  int main(void){
      const int ROWS = 6;
      const int CHARS = 6;
      int row;
      char ch;
  
      for (row =  0; row < ROWS; row++){
          for (ch = ('A' + row); ch < ('A' + CHARS); ch++){
              printf("%c", ch);
          }
          printf("\n");
      }
  
      return 0;
  }