题解（python）

a = input()
b = {}
for i in a:
    if i not in b:
        b[i] = 1;
    else:
        b[i] += 1;
c = []
prime = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97]
for i in b:
    c.append(b[i])
if max(c)-min(c) in prime:
    print("Lucky Word")
    print(max(c)-min(c))
else:
    print('No Answer\n0')