题解 | #查找兄弟单词#

while True: 
    try:
        a = input()
        b = a.split(" ")
        c = []#所有单词
        d = []
        for i in range(int(b[0])):
            c.append(b[i+1])
        #print(c)
        for i in range(len(c)):
            if b[-2] == c[i]:
                c[i] = ' '
            elif sorted(b[-2]) == sorted(c[i]):
                d.append(c[i])
		d = sorted(d)
        print(len(d))
        print(d[int(b[-1])-1])
    except:
        break