题解 | #查找兄弟单词#

abc = input().split()
real_abc = sorted(list(abc[-2]))
abc_remove = [item for item in abc if item != abc[-2]]
random_list = []
for abc_r in abc_remove:
    if real_abc == sorted(list(abc_r)):
        random_list.append(abc_r)

print(len(random_list))

try:
    sortlist = sorted(random_list)
    print(sortlist[int(abc[-1])-1])
except:
    exit