using System;

class Program
{
    static void Main()
    {
        int a = int.Parse(Console.ReadLine());
        int b = int.Parse(Console.ReadLine());
        int max = int.Parse(Console.ReadLine());
        int counter = 0;
        string combination = string.Empty;



        for (int A = 35; A <= 55; A++)
        {
            for (int B = 64; B <= 96; B++)
            {
                for (int x = 1; x <= a; x++)
                {
                    for (int y = 1; y <= b; y++)
                    {
                        combination = $"{(char)A}{(char)B}{x}{y}{(char)B}{(char)A}|";

                        if (counter < max)
                        {
                            Console.Write(combination);
                        }
                        A++;
                        B++;
                        if (A > 55)
                        {
                            A = 35;
                        }
                        else if (B > 96)
                        {
                            B = 64;
                        }
                        counter++;

                        //combination = string.Empty;

                    }
                }
            }
        }

    }
}