import sys

S = input()
S += ','
F = 'Failed...'
D = 'Done!'
for i in range(len(S)):
    if i % 3 == 0 and S[i] != 'A':
        print(F)
        exit()
    elif i % 3 == 1 and S[i] != 'C':
        print(F)
        exit()
    elif i % 3 == 2 and S[i] != ',':
        print(F)
        exit()
print(D)