题解 | #数据分类处理#

import sys

I = list(map(int,input().split()))    
R = list(map(int,input().split()))  
ICount = I[0]
RCount = R[0]
unique = []
I = I[1::]
R = R[1::]
R.sort()
for x in R:
    unique.append(x) if x not in unique else None
R = unique
res = []
for x in R:
    count = 0
    flag = 0 #表示I中没有元素包含R中的元素
    for i in range(ICount):
        if str(x) in str(I[i]):
            flag = 1
            res.append(i)
            res.append(I[i])
            count += 1    
    res.insert(-count*2,count) if flag == 1 else None
    res.insert(-(count*2)-1,x) if flag == 1 else None
    
res.insert(0,len(res))
s = str(res[0])
for x in res[1::]:
    s += ' ' + str(x)
print(s)