06. Wedding Seats

final_sector = ord(input())
rows = int(input())
odd_seats = int(input())
total_seats = 0

for i in range(ord('A'), final_sector + 1):
    for k in range(1, rows + 1):
        currentSeats = odd_seats
        if k % 2 == 0:
            currentSeats += 2
        for o in range(ord('a'), currentSeats + 97):
            print(f'{chr(i)}{k}{chr(o)}')
            total_seats += 1
    rows += 1

print(total_seats)