06. Wedding Seats

sector = input()
row = int(input())
spots = int(input())

add = 0
count = 0

for i in range(65, ord(sector) + 1):
    count += 1
    for f in range(1, count + row):
        if f % 2 == 0:
            for k in range(97,2 + spots + 97):
                print(f"{chr(i)}{f}{chr(k)}")
                add += 1
        else:
            for k in range(97, spots + 97):
                print(f"{chr(i)}{f}{chr(k)}")
                add += 1
print(add)