Add characters to a loop: C++

[pwnsamp]

I want to be able to take my code and add A, B, C, D, E, F to each row, as so:

  1A   1B   1C   1D   1E   1F 
  2A   2B   2C   2D   2E   2F 
  3A   3B   3C   3D   3E   3F 
  4A   4B   4C   4D   4E   4F 
  5A   5B   5C   5D   5E   5F 
  6A   6B   6C   6D   6E   6F 
  7A   7B   7C   7D   7E   7F 
  8A   8B   8C   8D   8E   8F 
  9A   9B   9C   9D   9E   9F 
 10A  10B  10C  10D  10E  10F 
 11A  11B  11C  11D  11E  11F 
 12A  12B  12C  12D  12E  12F 
 13A  13B  13C  13D  13E  13F 
 14A  14B  14C  14D  14E  14F 
 15A  15B  15C  15D  15E  15F 
 16A  16B  16C  16D  16E  16F 
 17A  17B  17C  17D  17E  17F 
 18A  18B  18C  18D  18E  18F 
 19A  19B  19C  19D  19E  19F 
 20A  20B  20C  20D  20E  20F 
 21A  21B  21C  21D  21E  21F 
 22A  22B  22C  22D  22E  22F 
 23A  23B  23C  23D  23E  23F 
 24A  24B  24C  24D  24E  24F 
 25A  25B  25C  25D  25E  25F

The code that I have is:

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
    const int ROWS = 25;
          int COLS = 6;
          int STARTING_VAL = 1;

    for (int row = 0; row < ROWS; row++)
    
    {
        for ( int col = 0; col < COLS; col++ )
        
        {  
            std::cout << std::setw(3) << STARTING_VAL + row << ' ';
        }
        
        std::cout << std::endl;
    }        

    return 0;
}

Can someone help me get this achieved? Unsure how to add characters to this loop.

[Ganado]

One quick way to do it would be to convert the col # into a character, by taking advantage of ASCII values.
std::cout << std::setw(3) << STARTING_VAL + row << static_cast<char>(col + 'A') << ' ';

An alternative way to do it would be to declare a string outside the loop.
const char* col_letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
And then do
std::cout << std::setw(3) << STARTING_VAL + row << col_letters[col] << ' ';
in the loop.

Obviously you'll start to need extra logic if you go beyond 26 columns.

[pwnsamp]

Thank you.