sector = input()
num_of_row = int(input())
num_of_seats_odd_row = int(input())
num_of_A = ord('A')
num_of_end = ord(sector)
num_of_small_a = ord('a')
counter_row = 1
total_seats = 0
for i in range(num_of_A, num_of_end + 1):
    for i2 in range(1, num_of_row + (i - num_of_A) + 1):
        if i2 % 2 == 0:
            for i3 in range(num_of_small_a, num_of_small_a + num_of_seats_odd_row + 2):
                print(f'{chr(i)}{i2}{chr(i3)}')
                total_seats += 1
        else:
            for i3 in range(num_of_small_a, num_of_small_a + num_of_seats_odd_row):
                print(f'{chr(i)}{i2}{chr(i3)}')
                total_seats += 1
print(total_seats)