b=list(map(str,input().split()))

counts = [b.count(x) for x in set(b)]
c = max(counts)  # 最大频率
d = min(counts)  # 最小频率
e=c-d
def f(r):
    
    for q in range(2,int(1+r**0.5)):
        if r%q==0 and r>1:
            return 0
    return 1
if f(e)==1:
    print('Lucky Word')
    print(e)
else:
    print('No Answer')
    print(0)
#哪里不对？？？RE