import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

s = readline().decode().strip()

splitted = s.split(",")
n = len(splitted)
counter = {}
for sp in splitted:
    counter[sp] = counter.get(sp, 0) + 1

if counter.get("AC", 0) == n:
    print("Done!")
else:
    print("Failed...")